Dynamic Conservatism
Abelard Podgorski
Introduction
Our beliefs often exhibit a kind of self-perpetuation. That is, once we have formed a belief,
we have a tendency to maintain it beyond what our evidence alone seems sufficient to explain. This
tendency manifests in a number of different ways. It is harder, often much harder, to change the mind
of someone who has already come to an opinion about something than to prevent them from forming
that opinion in the first place. Minor influxes of evidence against our settled views rarely dislodge
them, even when our original reasons were only marginally sufficient to justify those views, and we
often continue to hold our beliefs even once we have lost track of those reasons. When presented
with previously unconsidered alternatives to what we believe, we are inclined towards our original
position even though we may be unable to articulate why that position is superior. 1
In each of these cases, the mere fact that we already believe something seems to play a crucial
role in the explanation of why we continue to believe it. Let us call this psychological tendency towards
the perseverance of our beliefs doxastic inertia.
Especially when one reflects on the most extreme cases of stubborn belief, where agents act
impervious to mountains of evidence against their settled views, it is easy to feel pressure to dismiss
doxastic inertia altogether as a cognitive vice. But a number of philosophers have argued that doxastic
inertia in some form is a rational phenomenon. According to a family of views under the label of
epistemic conservatism, the mere fact that one already believes something can positively affect an
agent’s rationality in believing it going forward.2
1 More formal psychological investigation into belief perseverance can be found in the work of C.A. Anderson (1980).
2 Writers on the topic often give definitions of epistemic conservatism that are more committal about why behavior
1
I will begin this paper by gathering together a set of core motivations for epistemic
conservatism in the literature, all of which recommend the view as the best way to capture the
implications for rationality of the ways we face constraints on our limited cognitive resources. Then I
will look at the way conservatism has traditionally been developed and discussed and the reasons why
many philosophers have been skeptical about how it could, in this form, be true. The main task of this
paper will be to develop an alternative conservative view that can capture the core motivations for
conservatism without incurring the costs associated with the standard approach.
My solution turns on identifying a widespread assumption among both conservatives and their
critics – that there is a standing rational requirement for an agent to have beliefs with some appropriate
epistemic merit – which leads to conservatism being understood in the problematic, standard way,
and showing that this assumption is optional. The key to seeing that it is optional involves
distinguishing norms that govern states of mind like beliefs from norms that govern processes like
consideration, and developing a view which uses norms of the latter type in place of norms of the
former type.
According to such a view, our epistemic life is governed by at least two distinct sets of norms:
norms governing when to initiate the process of considering whether some proposition P is true, and norms
governing how that process operates, once initiated. A robust version of conservatism can be vindicated, I
will argue, provided that the right kinds of conditions must be met before one is required to reconsider
a question.
displaying doxastic inertia is rational than the one I have provided. For instance, Christensen (1994) takes conservatism
to be the view that “an agent is in some measure justified in maintaining a belief simply in virtue of the fact that the
agent has that belief.” Vahid (2004) considers it to be the thesis that “It is irrational to change beliefs without good
reason”. I choose my looser formulation here for two reasons. First, it is a common core in theories discussed under
the mantle of conservatism by both proponents and critics, across their various formulations. Second, I do not want
to prejudge the proper form of the explanation of rational doxastic inertia by building too much theory into our
definition, for reasons that should become clear later in this paper.
2
I will show that the resultant dynamic conservatism a) better captures the canonical motivations
for conservatism than the standard view, b) is consistent with an attractive principle about the
epistemic supremacy of evidence that the standard view must reject, and c) has special resources that
allow it to sidestep the major objections and worries raised against conservatism.
1.1 - The Canonical Virtues of Conservatism
That one's evidence matters for determining rational epistemic behavior is denied by no one.
That anything else matters, on the other hand, is far from clear. The conservative thesis in particular,
that the mere fact that one already believes the proposition in question matters, is a surprising one. We have
names for people who obdurately resist changing their minds, none of them flattering. We call them
(out of earshot, if we are polite) dogmatic, pigheaded, and, indeed, irrational. Conservatives are not
committed to licensing the most unpalatable instances of such behavior, but it is easy to conclude that
milder cases are simply less extreme failures of the same kind. So it will be important to survey the
reasons many have found conservatism attractive, both to feel the force of such a counterintuitive
claim and so that we may move forward with a sense of the degree and type of rational inertia the
conservative must license in order to secure the advantages that motivate their view.
1.2 - Cognitive Costs
In this paper, I'll focus on two purported virtues of conservatism. The first, defended in Lycan
(1988), emerges from the observation that changing ones' mind involves cognitive costs. A rational agent
with limited cognitive resources, it is claimed, will be responsive to these costs. Since these costs attach
to changes of mind, they will tend to lead agents who already believe something to continue to believe
it. Since conservatism recommends just this sort of behavior, it is argued, the view allows us to be
properly sensitive to the costs our cognitive limitations impose on us.
3
1.3 - Lost Evidence
The second virtue, discussed in depth by McGrath (2007), concerns the way conservatism
deals with lost evidence. Because we are forgetful creatures, we do not always remember the reasons for
which we formed a belief. But intuitively, we are rational in continuing to believe things we learned as
children even if we no longer remember our grounds. What can explain our rationality in maintaining
these beliefs?
According to an evidentialist view about memorial justification, like the one defended by
Christensen (1994), we are rational because despite losing our original evidence, we now possess some
new, independent evidential grounds for our belief.
But what is the nature of these grounds? It does not seem plausible that the grounds could be
some sort of quasi-perceptual experience, for there is no distinctive memorial phenomenology we
undergo throughout the period we maintain our belief. Neither, on reflection, does it seem right to
say that we are rational on the basis of our own past trustworthiness. For there may be agents, like
children, who do not even have sophisticated second order beliefs about such things, and they too are
intuitively rational in their remembrances.3
Furthermore, even when such a justification is available to the agent, it cannot make the agent
rational unless the agent's actual belief is in some way based on that justification. And it is doubtful that
agents in cases of forgotten evidence typically base their memorial beliefs on relatively sophisticated
considerations about the reliability of their past selves. These were not, after all, part of their basis
when they formed the belief, and they have never reconsidered the question in a way we would expect
to add to their grounds. If they were to question their belief, then they might be able to use evidence
about their past reliability to reaffirm it, by incorporating those considerations into our grounds. But
3 See McGrath (2007) who also raises the preceding points.
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this would not tell us why they were rational all the way up until that point. So even if such evidence
was sufficient for maintaining a belief, this kind of view could only tell us at best why it is rational for
agents who have such evidence to actively reaffirm a belief once questioned about it. It would not explain
why agents are rational to passively hold onto those beliefs when we have not yet used that kind of
evidence to form or reaffirm them.4
An alternative to evidentialism called preservationism (Burge 1997, 2003) holds that our beliefs
inherit the epistemic credit they had when we originally formed them. But for ancient evidence to
reach forward and do work on our rationality today is an odd sort of epistemic action at a distance.
More sharply, it is natural to think that part of what distinguishes rationality from externalist
phenomena like knowledge is that your rational responsibilities are constrained by what is available to
you and your success or failure by rational standards does not depend on things that are beyond your
ken. The evidence possessed by our childhood selves, however, is not now available to us any more
than that of a distant stranger and thus cannot bear on our current rationality. If preservationism were
correct, then two agents who are identical but for their distant histories, who currently have the exact
same information and experiences, will nevertheless differ in whether it makes rational sense now for
them to hold a given belief, purely due to facts about their remote history to which neither has any
access. This is intuitively the wrong result.
Conservatism, McGrath argues, promises to capture our commonsense judgments about the
rationality of memorial belief without running into the problems faced by the views just discussed.
The conservative suggests that the mere fact that one already believes something can affect the
rationality of continuing to believe it, even when the other evidence alone is not sufficient. If this
pressure towards doxastic inertia is strong enough, we can secure rationality in cases of memory
without appealing to other evidence at all, and therefore without choosing between implausible
4 We will return to the distinction between passive and active inertia of beliefs in section 5.
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candidates for our evidential basis in our current perspective, as the evidentialist is forced to do, or in
our remote and inaccessible past, as the preservationist is forced to do.
The leakiness of our memory, moreover, is not a mere misfortune. Since our minds have
limited storage, Harman (1986) argues, we must be selective about which beliefs to keep around, which
to allow to be forgotten, and which evidential relations between beliefs to track. A rational agent will
avoid mental clutter. Often, the beliefs we consult in forming a conclusion are less important than the
conclusion itself, like a ladder that may be thrown away after it has done its work. All that work,
however, will have been for naught if the agent is required to drop the belief as soon as she loses her
evidential justification for it. Respecting the need for clutter avoidance, then, requires allowing the
beliefs of rational agents to outlast the evidence for them. In light of our limited storage, our forgetting
of evidence is not a bug but a feature.
I will call the advantages conservatism has in treating these two subjects – the cognitive costs
of belief revision and cases of lost evidence – the canonical virtues of the conservative view. I do not
mean to suggest that they are the only reasons one might be attracted to conservatism. But they are
widespread, cited by almost everyone who has defended a conservative view.5 Moreover, they form
an interesting class. They are concerned with the ways we are cognitively limited – in the first case, by the
fact that changing our beliefs is costly, and in the second case, by the fact that our memories are both
finite and leaky. In this paper, I will be interested only in forms of conservatism which can capture the
canonical virtues.6
5 Harman (1986), Lycan (1988), McGrath (2007), McCain (2008), and Poston (2012) are a sample, all of whom appeal
to the canonical virtues.
6 It is for this reason that I will not consider standard Bayesian accounts of rational credence, which might
understandably be labeled a kind of conservative picture. Such views have quite different motivations than the ones I
am concerned with here. Because of the strict demands of probabilistic coherence they place on our credences, they
are in a particularly poor position to reflect sensitivity to our cognitive limitations. Nevertheless, he view I consider on
page 16 is in important ways structurally analogous to the Bayesian view.
6
Some authors have suggested that in addition to what I call the canonical virtues, conservatism
could help solve general problems of skepticism (Sklar 1975, Lycan 1988, McCain 2008, Poston 2014).
I will briefly discuss this motivation later in the paper, but I warn the reader in advance that if they are
looking for a response to the skeptic, they will not find it in the view I endorse. If you are disappointed,
read this paper as an argument that it’s useful to distinguish two sets of putative epistemological
advantages of conservatism which need not go together, and therefore that those who want to use
conservatism for extremely ambitious philosophical payoffs should be wary of appealing to its more
mundane advantages in order to motivate the view.
2.1 - Standard Conservatism and its Costs
Individual conservative accounts can be distinguished by their explanation of why doxastic
inertia is rational. Although they differ significantly in their details, many writers on both sides of the
topic seem to assume, explicitly or implicitly, that the explanation of rational inertia takes a certain
form. Their characterization of conservatism suggests that there is rational pressure in favor of holding
on to your beliefs because the fact that you already believe something confers some sort of epistemic
merit on your belief – or as I will put it, contributes to it being epistemically worth believing, in a distinctly
non-evidential way.
Standard Conservatism: The mere fact that one already believes P can positively affect whether P is
worth believing in a non-evidential way.
Different views formulated along the standard line may take different stances on the exact
contribution that the existing belief that P makes – providing a reason for (Adler 1996, Crook 2000),
justifying (McCain 2008), or granting prima facie rationality to (McGrath 2007). “Worth believing” is
meant to be neutral between these, and I do not mean, by lumping them together, to suggest that
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there are no important contrasts to be made between views depending on which of these relations is
treated as the relevant one. But all of them suggest that the mere fact that one holds a belief contributes
some epistemic merit to it. The qualification that this contribution is distinct from that of the evidence
serves to differentiate the view from run-of-the-mill evidentialism, though a view on which existing
belief is evidence of a special kind might count as distinctively conservative. We will examine the
prospects of such a view later in the paper as an alternative to the standard approach.
It may be that some of the authors who have formulated conservatism along standard lines
are not ultimately committed to understanding their view in this way. And others have simply not
been clear or consistent about what form of conservatism they intend to discuss. 7 But this way of
understanding the view is widespread enough that it has become a common currency between
conservatives and their critics, and as I will argue, this is not without consequence.
I will save a diagnosis of the prevalence of this approach for later in this paper. Ultimately, my
goal is to develop an alternative model of conservatism. But why should a conservative look elsewhere,
if the standard view is such a natural approach? In the following two sections, I will discuss the costs
that one incurs by accepting the standard model.
2.2 - The Evidence Restriction
The first major cost of the standard conservative thesis is that it directly conflicts with a
plausible principle we may call the evidence restriction.
7 Harman (1986) sometimes seems to characterize conservatism in a way that implies the standard view, for instance, as
involving the claim that propositions “acquire justification simply by being believed” (pg. 30), elsewhere in a way that
does not (pg. 46). McGrath (2007) recognizes that conservatism could be formulated in a non-standard way (pg. 2),
but proceeds under the assumption that these would be equivalent.
8
Evidence restriction (ER): The only considerations that, from the perspective of epistemic
rationality, contribute to P’s being worth believing are evidential – they bear positively on the belief’s
truth.
I will argue later in this paper for a kind of conservatism that is consistent with ER. But first,
it is important to say a little about why we should take the evidence restriction seriously. After all, we
have just been presented with a battalion of arguments in favor of conservatism. If the most natural
accounts of conservatism are in tension with ER, one might think, so much the worse for the latter.
But I do not think we can afford to be quite so cavalier.
First, we may note that the evidence restriction has more surface plausibility than
conservatism, which is a rather counterintuitive view. More importantly, however, ER can be
motivated by reflection on cases where agents believe for manifestly pragmatic reasons. Suppose you
are offered a million dollars to believe that the next election will be won by the incumbent. There is,
perhaps, some sense in which the offer counts in favor of the belief or makes the belief worth having.
But the nigh-universal response to this case is that considerations like the promise of money, or the
threat of torture, do not count in favor of a belief in the right way for epistemic rationality. An agent
who formed a belief in response to such considerations might be admirable from a practical
standpoint, but they would violate their distinctly epistemic responsibilities. And a natural thought
further identifies just why such considerations do not make an epistemic contribution: what
distinguishes epistemic requirements from requirements of other sorts is precisely their concern with
truth and falsehood. The fact that I will receive money for believing something does not bear in any
way on whether that belief is true, and for that reason does not make the proposition worth believing
from the epistemic standpoint. Since those considerations which are connected in this way with truth
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and falsehood are just what I am calling evidence, the evidence restriction is implicit in this natural
explanation of the epistemic inefficacy of threats and rewards.
It is worth noting that the evidence restriction is both weaker than a view that many
philosophers have found plausible and stronger than what one needs to generate a worry for standard
conservatism from a similar direction. It is weaker than the view we might call pure evidentialism,
according to which an agent's epistemic rationality supervenes entirely on their evidence. To get that
stronger view, we would have to add a bridge principle from beliefworthiness to rationality of the sort
I will go on to reject. Indeed, the view I defend in this paper is one way to accommodate ER while
rejecting pure evidentialism. So those skeptical of pure evidentialism should not for that reason alone
reject ER. And even if one is unsure of ER, it would be enough to raise doubts about standard
conservatism if the mere fact that one believes P seems like the wrong sort of thing to make P worth
believing, whatever other non-evidential factors might plausibly matter.
I do not claim that the considerations here are dispositive. My point is just to emphasize that
abandoning ER is a real cost of the view. If there is an alternative picture that could preserve the
motivations for conservatism while remaining consistent with ER, it is worth exploring.
2.3 - Three Objections to Standard Conservatism
Besides being inconsistent with ER, conservatism in its standard form has been subjected to
several powerful criticisms. In this section, I will survey the three I take to be most threatening, all of
which have at various points been raised by David Christensen (1994, 2000), and argue that the
responses available to the to the standard conservative either fail or threaten to undermine their ability
to secure the canonical virtues.
The first objection concerns our practices of explicit justification. When asked to justify our
belief, or tell someone why something is worth believing, it is natural to refer to the evidence in favor
of that belief. It is intuitively inappropriate to cite the fact that you already have that belief, just as it is
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inappropriate to cite the fact that someone offered you money to believe it. This objection cuts most
sharply against the kind of standard conservative8 who takes ones' current belief to provide a reason
for continued belief, since reasons are paradigmatically the sort of thing one lists to others when
justifying oneself or weighs explicitly in deliberation. But any standard conservative thinks that current
belief confers some sort of epistemic merit on continued belief. And yet there does not seem to be a
natural context where “because I already believe it” is appropriate as an answer to a question like
“what justifies your belief?”, “Why should you believe that?” “What are your reasons for believing
that?” or “What makes that the right thing for you to believe?” Neither does this sort of consideration
seem to come up when we are deliberating privately about what to believe. As long as we take the
considerations that we are willing to cite in favor of our beliefs as at least a presumptive guide to the
considerations which in fact count in favor of them, this gives us reason to be skeptical of standard
conservatism.
In response, the standard conservative may try to appeal to pragmatic considerations to explain
why such appeals are infelicitous. Poston (2012) suggests, for instance, that in normal contexts of
justification, citing a consideration implicates pragmatically, though does not literally convey, that it is
a special piece of evidence. But pragmatic implicatures are typically cancellable – when we make explicit
in our utterance that we do not mean to suggest the content that would otherwise be implicated, the
implication disappears. However, adding “I don't mean to imply that this is evidence, but...” to
assertions like “the fact that I already believe it justifies my believing it” does not seem to render them
any more acceptable. Such citation sounds bizarre however it is qualified. So it fails the standard test
for pragmatic implicature. Furthermore, even if dialectical norms of conversational implicature could
explain why it seems inappropriate to say things to others that, on the standard conservative model, are
8 See Adler (1996), Crook (2000).
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strictly true, they don’t explain why in purely first-personal contexts, when we are merely thinking to
ourselves, it still seems wrong to consider mere belief in P among our reasons or justifiers for P.
The second worry is that standard conservatism seems to license a kind of objectionable
bootstrapping. 9 The conservative holds that some beliefs that it would not be rational to form from
scratch given ones' evidence are rational to maintain if one already has them. But suppose that an
agent who doesn't have sufficient evidence to form a belief goes ahead and forms it anyway. Now, in
addition to their evidence in favor of that belief, they may add to the considerations favoring it the
fact that they already believe it, heightening its epistemic merit and, in marginal cases, making it rational
for them to keep believing it. But forming a belief irrationally seems like an illegitimate way to give
that belief an epistemic boost.
Some conservatives (McCain 2008, Poston 2014) respond by proposing limitations on the
conditions under which mere belief provides its epistemic boost. Ted Poston (2014, Ch. 2), for
instance, limits the contribution of mere belief to cases of empty symmetrical evidence – when there
is no evidence one way or the other about P. The most objectionable kinds of bootstrapping, where
one might bootstrap oneself into believing against the evidence, could thereby be avoided.
One worry about this kind of move is that such constraints can look ad hoc. If mere belief
can contribute to epistemic merit, why would this contribution vanish in precisely these cases? More
importantly, however, there is a tension between this strategy and one of our canonical motivations
for conservatism. Note that once a belief has been formed on insufficient evidence, the agent is in the
same subjective situation as one who formed a belief rationally and then lost track of the evidence for
it. It was supposed to be a virtue of the conservative view that it could allow us to hold on to our
beliefs in cases of that sort. Since there is this symmetry between cases of irrational belief formation
9 More discussion of bootstrapping and epistemic conservatism can be found in Foley (1983), Feldman (2003), and
Fumerton (2007).
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and cases of forgotten evidence, however, the very feature of standard conservatism which let it
explain rationality in cases of forgotten evidence commits it to bootstrapping poorly formed beliefs.
Poston’s suggestion may avoid the worst sorts of bootstrapping, but only by limiting justified cases of
lost evidence to exceedingly rare instances where we end up with no evidence once way or another.
In general, placing conditions on the contribution of mere belief substantially limits bootstrapping at
the cost of equally substantially surrendering the cases of lost evidence conservatism promised to
explain.
Finally, standard conservatism is accused of violating demands of epistemic impartiality.
Impartiality demands that we not treat our own beliefs as special, from an epistemic point of view,
compared to the beliefs of others, merely because they belong to us. It is fine to regard one's own
beliefs as special if, for instance, one takes oneself to be in a better epistemic position than other
people. To do so merely because they're one's own, however, looks like epistemic narcissism. But the
standard conservative does seem to endorse this kind of asymmetry – the fact that I believe something
confers some positive status to my continued belief, but the fact that you believe something does not.
But what's so special about me that makes my current opinions worth emulating?
McGrath (2007) makes the suggestion that we should treat the beliefs of others as conferring
the same sort of epistemic value on our beliefs as those beliefs confer upon themselves, by taking the
epistemic contribution of mere belief to parallel that of testimony. The mere fact that others believe
something can, on such a view, justify our accepting it. But there are reasons to worry about this move.
First, if the role of our beliefs in justifying themselves is to match that of testimony, and conservatism
is to survive as distinct from ordinary evidentialism, then a proponent of this strategy must commit
to a view on which testimony rationally justifies in a way different in kind from ordinary evidence,
since non-conservatives are happy to grant that existing belief can sometimes make that sort of
contribution (Christensen 1994). While such a view is by no means obviously wrong, it introduces
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additional controversy. Second, unless we accept a preservationist account, which would make
conservatism redundant for explaining the rationality of memory, the beliefs of others make us rational
in believing things only through our own beliefs about what others believe. A fully symmetric approach to
conservative justification, then, will say that it is through our belief that we already believe P, rather than
the mere belief that P itself, that we are rational to continue to believe P. But this is not how
conservatives, including McGrath himself, have understood their view, and worries would be raised
about cases where we lack the relevant second order beliefs or where we are mistaken about what we
believe, since it would suggest that there cannot be conservative justification in such cases. And the
need to account for the rationality of memorial belief in cases where second order beliefs are not
present was precisely the sort of thing conservatives would like to use as leverage against the evidentialist
account of memory. If we want to avoid these problems, we will have to commit to at least one striking
asymmetry between the way our own belief that P makes continued belief rational and the way
someone else’s belief that P does, and this puts pressure on the idea that testimony and doxastic inertia
are two sides of the same coin.
These objections are, again, not intended to be entirely conclusive. A devoted standard
conservative may be willing to take on radical commitments about the pragmatics of justification or
the nature of testimony to avoid them, or to make sacrifices to the canonical virtues that give
conservatism much of its appeal. But I’ve tried to argue that the responses will not be cheap or easy,
and represent genuine costs of the standard approach.
3.1 - State-oriented Worth Believing: A Diagnosis
Standard conservatism, we have seen, carries serious costs, as it must reject the plausible
Evidence Restriction and has no easy reply to a number of forceful objections. If we are attracted by
the canonical virtues, then, we have strong reason to look elsewhere. Yet alternatives to the standard
model are largely unexplored. In this section, I will try and diagnose why the standard view might have
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seemed the only plausible option for the conservative by identifying a common assumption which
provides the basis for an argument for the standard view, and arguing that rejecting other premises is
an unattractive option for anyone seeking to secure the canonical virtues.
The standard view is as standard as it is, I suspect, because many philosophers at least implicitly
accept a norm to the effect that an agent is irrational for believing something that is not justified or
supported by their reasons. 10 These are versions of the norm I will call State-oriented Worth Believing,
with different conceptions of the conditions of beliefworthiness filled in:
State-oriented Worth Believing (SWB): It is irrational to believe something that is not worth
believing (from one’s perspective).
This norm has two notable features: it connects an agent's rationality with the considerations
bearing on beliefworthiness, and it is state-oriented – rendering an agent irrational in virtue of features
of the mental states they are in (in particular, the beliefs they have) at individual times. This norm may
seem trivial; we will soon see that it is not.
It is only a short jog from this principle to the conclusion that conservatism must take a
standard form. Consider the following argument:
P1) Conservatism: The mere fact that one already believes that P can make it rational for one
to believe P going forward. That is, there are cases of rational doxastic inertia.
P2) SWB: It is irrational to believe something that is not worth believing.
P3) In cases of doxastic inertia, if one did not already believe that P, P would not be worth
believing.
10 See e.g. Broome (2007), Way (2009), Lord (2014) for explicit endorsements of principles of this sort.
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P4) (From P1, P2, P3) There are cases where the mere fact that one already believes that P can
make P worth believing.
P5) The mere fact that one already believes that P is not evidence that P.
C) (From P4, P5) Standard Conservatism: There are cases where the mere fact that one
already believes that P non-evidentially makes P worth believing.
There are two ways one might try to resist his line of reasoning from conservatism and SWB
to standard conservatism. The first way is to reject P3. This requires claiming that in cases of rational
doxastic inertia, the belief would be worth having even if the agent didn’t already have it. In order for
the view to be conservative, though, the fact that one already believes P must make a difference. So, such a
view would require some independent norm that at least sometimes prohibits one from adopting
perfectly worthy beliefs if one does not already have them. But whether or not such a norm is plausible,
this sort of conservative view won’t be able to capture the canonical virtues we identified for
conservatism. This is because in many cases of lost evidence where we are intuitively rational in
maintaining our belief, the evidence we have is very meager or nonexistent, and it is singularly
implausible that when one has very little or no evidence for P, P could be worth believing on the
evidence alone. The reason we do not form beliefs on the basis of little to no evidence is not to avoid
being inconsistent over time – it’s that the evidence isn’t good enough to warrant it.
The second way is to deny P5, and assert that mere belief is evidence for itself. However, when
this claim is distinguished from other claims that superficially resemble it, such as that certain
appearances can be evidence for beliefs with the same content (Huemer 2013), that a coherent system of
beliefs might justify its members (Elgin 2014), or that beliefs together with information about our general
reliability can justify themselves (Christensen 1994), it looks rather implausible. In the absence of any
reason to think that I’m reliable or that my belief is well-formed, it is doubtful that my belief is evidence
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at all – we certainly don’t cite it as such. If it is, it is plausibly very weak evidence at best. This, again,
threatens the view’s ability to explain the range of cases of lost evidence we want, which include cases
where our current evidence is insufficient by a fairly wide margin. Moreover, this view is in an even
poorer position to respond to the first two objections to conservatism than the standard picture,
because a) evidence is precisely the sort of thing we’d expect to be dialectically appropriate to cite in
explicit justification, and b) the bootstrapping worry is particularly forceful against the view of mere
belief as evidence – such a view implies that merely forming a belief is a way of gaining evidence for it,
which is even more implausible than the claim that merely forming a belief could non-evidentially
justify it.
So if SWB is true, we must either reject conservatism (of a form that can capture the canonical
virtues) or accept the standard view. This, I propose, is why the standard view is so widely assumed.
This is further evidenced by the fact that authors on both sides of the debate often define conservatism
in a way that presupposes that mere belief must contribute to the belief’s epistemic merit to rationalize
doxastic inertia, a presupposition that only makes sense if something like SWB is lurking in the
background. McCain (2008) and Christensen (1994) both define conservatism as the view that mere
belief confers justification, and Poston (2012) identifies it as the claim that characterizes it as “the
mere holding of a belief confers some positive epistemic status on its content”.
If we want to hold on to the canonical virtues without incurring the standard costs, then, we
must reject SWB. Purely on its face, it must be admitted, SWB certainly looks more appealing than
conservatism. It may be hard to see how one could even deny it. But both the benefits a robust
conservatism can secure and the challenges the standard view faces are considerable. Instead of
abandoning conservatism or accepting the standard view, warts and all, then, I want to explore what
happens if we take the road less traveled and reject SWB.
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4.1 - The Dynamic Strategy
Throwing out SWB places us in a position of some disarray. On the standard conservative
model, SWB is an important part of the explanation why doxastic inertia is rational – according to the
standard view, the fact that one already believes something contributes to beliefworthiness, and SWB
tells us that a belief's worthiness is crucial to determining the agent's rationality in continuing to hold
it. Without SWB, it is not at all obvious how a conservative view will be reconstructed. In addition,
rationality surely has something to do with being responsive to the considerations that make things
worth believing. SWB was the most natural way to cash this out. Some sort of replacement is required
that will not simply regenerate the problems that led us to reject SWB in the first place.
The view I am about to sketch exploits a distinction that other authors have emphasized for
different purposes – one between considerations that bear directly on the question of whether p and
those that bear on the question of whether to make up ones' mind or engage in deliberation about p.11
Making this distinction does not, by itself, provide us with a way to avoid the pitfalls we have
discovered, for it remains an open question what relevance these different types of consideration have
for assessing the rationality of agents. As long as the upshot for rationality still includes a version of
State-oriented Worth Believing,12 we have made no progress.
What I propose is a dynamic interpretation of the rational relevance of both types of
consideration. It is dynamic because it appeals, not to norms that police an agent's mental states at
particular times, like SWB, but rather to norms that govern processes, essentially diachronic causal
11 See, for instance, David Owens (2000, p. 157-158) on “two-dimensional rationality” during a defense of a
preservationist view of memory, Pamela Hieronymi's discussion of the “wrong kind of reasons” problem (2005), and
the discussion of “two-stage” theories in the exchange between Mark Schroeder (2012, 2013) and his critics (Hieronymi
2013 Shah and Silverstein 2013 Hubbs 2013)
12 Schroeder's (2012) and Owens's (2000) formulations of the two-stage view are examples of views that do maintain
SWB.
18
patterns of mental activity, over intervals of time.13 In particular, I want to focus on the process of
considering whether P, for a given proposition P.
We may distinguish two kinds of norms governing a process of consideration. First, there are
norms that determine when a rational agent initiates such a process. Second, there are norms that
determine the rational operation of that process, once initiated. On my view, considerations of one type
will feature in norms on the initiation of the process, and considerations of a different type will feature
in norms on the operation of that process. 14
I will present a simplified model on which consideration is the only process by which we
rationally form or give up beliefs, so we may see in an uncluttered way how a dynamic model operates,
and take for granted that whatever other belief-forming processes there are, either they are governed
by similar norms and will therefore function in a similar way, or they are not intrusive enough to
undermine the general patterns I describe. This illustrative model is only a partial sketch of the full
story of norms governing even the single process of consideration. But I will begin to fill the gaps left
by our rejection of SWB and show how the conservative picture it generates is attractive as a model
of rational doxastic inertia.
4.2 - Dynamic Conservatism
I begin with a dynamic replacement for SWB – a norm that describes how our epistemic
behavior must be sensitive to the considerations that make things worth believing.
13 That a broadly dynamic approach to rationality would have implications for the conservative project was recognized
by Barry Lam (2007), though he does not develop the thought in detail and his understanding of the nature of dynamic
requirements differs in important ways from mine, for instance in whether such requirements apply to processes or
mere changes of attitude.
14 My own view is that we should go in for a purely dynamic picture, on which there are no norms on states at all. But
that is beyond the scope of this paper. What matters for our purposes is that there isn’t a standing requirement like
SWB requiring us to have beliefs with sufficient merit. We may leave open whether there are, for example, requirements
not to have contradictory beliefs.
19
Dynamic Worth Believing (DWB): It is irrational to conclude consideration of whether P by
forming or reaffirming the belief that P if P is not worth believing (from one's perspective).
If SWB is true, then so is DWB. But the reverse does not hold. DWB places constraints on an
agent only in the course of a process of considering whether P, and only when the agent is forming or
reaffirming a belief during such a process. This is crucial, for it is what allows the view to resolve the
tension between conservatism and ER.
To see how this works, we must explain how our dynamic picture secures conservatism. All it
takes, I suggest, is this general claim about the norms surrounding the initiation of consideration:
Inconsiderate: One is not always rationally required to initiate consideration whether P when one
believes that P and one's evidence does not make P worth believing (from one’s perspective).
If Inconsiderate were false, then whenever one believed P and one's current evidence wouldn't
justify forming that belief from scratch, one would be required to reevaluate whether P (and,
consequently, give up that belief). That’s no good for conservatism.
But if Inconsiderate is true, then there will be some cases where one's evidence does not make
P worth believing, one believes P, and one needn't reconsider that belief. For as long as that state of
affairs lasts, the mere fact that one already believed P (together with the fact that one was not required
to reconsider) explains why one is rational in continuing to believe P, at least until one is required to
reconsider.
If one didn't already believe P, then to believe P, going forward, one would have to form that
belief. To form that belief (on our simplified picture at least), one would have to consider it. And DWB
tells us that the formation of the belief during such a process must be sensitive to whether the belief
20
is worth having, which in this case it is not. So the behavior demanded of an agent who already believes
P, in such cases, going forward, is very different from the behavior demanded of an agent who does
not.
The key point here is that vis a vis the process of consideration, an agent who does not believe
P can be rational in coming to believe P only in one way, by rationally considering whether P and then
forming that belief. An agent who already believes P can be rational in continuing to believe P in two
ways, by rationally considering whether P and then reaffirming it (the same way the nonbeliever has),
or by rationally not reconsidering whether P. So, at least as far as consideration is concerned, it is
strictly easier for it to be rational to believe P going forward if one already believes it. This is, of course,
a characteristically conservative position.
4.3 - Strengthening the View: Dynamic Worth Considering
We have seen that if Inconsiderate is true, then the dynamic approach justifies a form of
conservatism. And Inconsiderate is a relatively weak claim. All it takes for it to be true is a single case
where one may permissibly fail to reconsider a belief in P while one's evidence doesn't make P worth
believing. As one case of this sort: suppose one comes into possession of a large amount of new
evidence sufficient to undermine the justification of a large number of beliefs, which one cannot
consider all at once. If Inconsiderate were false, then it would be impossible for one to avoid
irrationality in such a case. But intuitively, agents in this position, who are forced to prioritize which
questions to consider now and which to leave for later, are not irrational. While it may be that sometimes
a defect of one’s belief must trigger reconsideration – when, for instance, the agent is in a position to
easily recognize the defect and to improve their position in a straightforward manner (when they have
blatantly contradictory beliefs, perhaps), to expect this of agents in all cases of evidential insufficiency
would be extremely demanding. And while not all philosophers take demandingness seriously as a
constraint on epistemic theorizing, it is implicit in the core motivations for conservatism.
21
The downside to the weakness of Inconsiderate is that the form of conservatism it guarantees
is correspondingly weak. It is consistent with the existence of only a handful of cases of rational
doxastic inertia. But a conservatism which justifies rational inertia only in some very small or
theoretically uninteresting range of cases is not the success we want from a view which involves so
drastic a rethinking of the norms on rational belief. Ideally, we want a conservatism strong enough to
secure the advantages proponents of standard conservative views have long touted for their own
views. To achieve this, we will have to say something stronger than Inconsiderate. In what follows, I
will propose some plausible developments of the view and show how, thus bolstered, it can capture
the canonical motivations for the conservative outlook concerned with our cognitive limitations.
We can begin our development with the following observation: just as there are things that
bear positively or negatively on whether something is worth believing, there are things that bear
positively or negatively on whether a question is worth opening for consideration. And there will be
corresponding norms that connect an agent's rationality to the way they respond to such reasons. For
instance:
Dynamic Worth Considering: It is rationally required to consider whether P only when it is worth
considering whether P.
In general, those things that make P more worth considering will push in the direction of
rationally requiring the agent to consider, and those that make P less worth considering will push in
the direction of making such consideration optional or prohibited. We are in a position, then, to work
out the contours of dynamic conservatism by thinking about what sorts of things bear positively or
negatively on whether it is worth considering whether P. Here are some plausible candidates.15
15 I should note, importantly, that we are interested in what is worth considering from the agent's perspective, so these are
22
More Worth Considering:
1+) It is now especially important that I believe truly regarding P.
2+) I am now in a significantly better epistemic position regarding P than I was when I last considered
P (for instance, by having recently received evidence regarding P, or because my current belief that P
was formed in unfavorable circumstances, like when I was drunk).
3+) I am now in a significantly better epistemic position regarding P than I will be in the future (for
instance, by having evidence available that I expect to lose).
Less Worth Considering:
1-) It does not matter whether I believe truly regarding P.
2-) I am now in a worse epistemic position regarding P than I was when I last considered P (for
example, because I have lost evidence regarding P, or because I am now tired or under the influence
of drugs).
3-) I am now in a worse epistemic position regarding P than I will be in the future (for example,
because I anticipate crucial evidence is forthcoming, or because I am now tired or under the influence
of drugs).
4-) Considering P is an expenditure of time or cognitive effort.
The lists are only a suggestion and only a start, and the reader is invited to disregard those
entries they find questionable and include others they find compelling. A fully mature dynamic theory,
which we do not have space to develop here, will unify and explain the items on these lists in a
considerations which are believed by the agent or otherwise cognitively available to her, and they needn't be true.
23
principled way.16 For now, it will suffice to note that which lists we accept tells us, in some qualitative
way, what the resultant conservatism will look like. In particular, we expect rational cognitive inertia
to be less prevalent when items from the first list are present, since those will make rational agents
more inclined to reconsider and therefore keep up with their evidence, and more prevalent when items
from the second list are present, when they will be inclined to hold on to their existing opinions.
One additional question to ask is whether by default; that is, without special reasons one way
or the other, consideration is rationally required, permissible, or prohibited. I suggest the following
thought: we spend much of our time not considering any question of belief at all. The rest of the time,
we consider at most a small number of beliefs. If we are not being irrational in acting this way, as is, I
think, the appropriate presumption, then either failing to consider is at least default permissible, or the
things that count against considering are ubiquitous enough that for practical purposes we may treat
it as if it were so. Whatever it takes to make consideration required is, in the normal case, fairly
substantial, or the default permissibility would be too often overridden to make sense of our intuitively
reasonable practices of consideration.
With the substance of a dynamic view (partially) filled out in this way, we are in a better
position to see how it handles the cases of interest to conservatives.
5.1 - The Canonical Virtues, Revisited
If, as I suggested, not considering has at least a de facto default permissible status, then there
will be a kind of general, permeating presumptive conservatism. We are not required to consider a question
until we have some special positive reason to do so. So agents will be rational in maintaining any given
belief for at least as long as they do not encounter such a reason. Atop this presumptive conservatism,
16 At the end of section 5.1, I propose a thought that may serve as the beginning of such a theory.
24
our view warrants an additional push towards doxastic inertia in the presence of items from our second
list, reasons against considering.
Now, recall the canonical virtues of the conservative approach. The first suggested that
conservatism represented a way for rational agents to be sensitive to the fact that changing beliefs has
cognitive costs. The second suggested that conservatism reflected our rational need to trust our memory and
avoid clutter, by letting us maintain our belief and thereby take advantage of the original justification we
had for our views even when it has been lost.
Because of the presumption of rationality for not considering, our version of conservatism
substantially limits the burdens on our cognitive resources, and frequently spares us the cost of
changing our minds. In fact, I suggest, our dynamic approach is a better account of how the cognitive
costs of giving up our belief justify doxastic inertia than the ones built to explain that very fact. On
some standard conservative accounts, we have our evidence for various positions, and then because
there are costs to changing one’s mind, there is a little extra justification sprinkled atop those
propositions we already believe. Rational agents are responsive to the sum total of the evidence and
this extra justification, and thereby exhibit cognitive inertia.
But this effectively locates the important cognitive costs in the wrong place. Once we have
assessed our evidence, the additional cost of merely changing our opinion is miniscule. Indeed, it tends
to happen automatically and almost instantaneously. The expenditures involved in changing ones’s
mind are primarily expenditures involved in the processes of assessing the evidence leading up to the
change in belief. An approach that treats existing belief as something that goes into the calculation of
on-balance justification with other familiar evidential factors requires us to be conscientious in taking
the evidence into account anyway, and spares us only the trouble of switching beliefs when the evidence
turns out to be very close. Our view, in contrast, spares us the costs of assessment itself, which is as
it should be.
25
The presumptive conservatism our view generates is also strong enough to imply that in a
range of cases, we may persist in our beliefs after we have lost our evidence. As long as an agent lacks
any special reason to reconsider that belief, she is rational to hold on to it even if, due to the need to
minimize mental clutter or through sheer forgetfulness, she no longer has the same evidence available
to her. And we secure this without needing to locate the source of this rationality in either her current
evidence or in her past evidence.
So dynamic conservatism is able to capture the most important case judgments involved in
these arguments for conservatism. But it does much more than this. Notice that we have secured these
judgments by appeal only to the default rationality of not considering. This presumptive conservatism
bears some structural similarity to standard conservative proposals (McCain 2008, McGrath 2007)
which claim that the mere fact of belief renders it prima facie rational, a status which is then
undermined by defeaters of various kinds. Those views also offer a way to limit strain on our cognitive
resources and allow us to believe when we have lost our evidence, as long as the conditions for defeat
are sufficiently strong. But when one looks at the mechanics of these views, one finds no reference to
the costs of belief formation, to clutter avoidance, or to the limitations of our memory. To the extent
that defeat conditions are developed at all, one finds general evidential defeaters like “If S has better
reasons for believing that ~P than S's reasons for believing that P, then S is no longer justified in
believing that P” (McCain 2008, pg. 186) These are plausible enough as defeaters go. It is obscure, on
these views, however, how the fact that forming beliefs is costly, that we must avoid clutter, or that
our memories are limited might explain the existence and extent of rational doxastic inertia. Why these
particular defeaters? Why not stronger ones? Why not weaker ones?
Our cognitive limitations are contingent facts about us. But on such views, no sense is given
of how our conservative practices should change if, for example, the costs of belief formation were
less, or we did not have to worry about mental clutter, or we had perfect memories. These views may
26
get the cases right, but they seem to operate in isolation from the thoughts that motivated those cases,
and so seem to get them right by coincidence.
On our view, on the other hand, once we move past the basic presumptive part of the dynamic
picture and begin to look at the list of candidates for reasons against consideration, we find those very
thoughts reflected back at us directly. 4-, for instance, tells us that some degree of conservatism is
warranted in virtue of, and to the extent that, considering a question represents a burden on our
cognitive resources.
In addition, not only can we explain our rationality in the face of losses of belief that occur as
a consequence of clutter-avoidance, our view suggests an independent mechanism for clutter avoidance,
in the form of 1-. Our original state concerning most beliefs, after all, is nonbelief. The vast majority
of beliefs are acquired, not innate. So a tendency not to consider a question when it lacks importance
manifests on balance as a tendency not to have beliefs about such things, that is, precisely a tendency
not to clutter ones' mind with trivialities. So our view is especially well placed to appeal to those who
take clutter avoidance as a serious concern for rational agents.
Furthermore, 2- tells us that the degree to which doxastic inertia is warranted is sensitive to
the ways our condition as finite human agents may lead our epistemic position to deteriorate over
time. One way, of course, our epistemic position may deteriorate over time is through the loss of
memory. And the thought that our rational norms should reflect this by inclining us to trust our beliefs
is precisely the sort of thing underlying the attractiveness of conservatism as an account of the
rationality of memorial belief.
In fact, I think we may understand the conservative insight about memory as merely a special
case of a more general, more fundamental motivation for our dynamic picture. Our norms on rational
epistemic behavior, I suggest, should lead us to do work on our beliefs at precisely those times when
that work will be most epistemically effective. In the end, we want our beliefs to reflect the best
27
response to the most information, and then lock them in until an even more optimal situation comes
along. This is reflected in the interaction of considerations like 2+, 3+, 2-, and 3-. If I expect I may
have lost evidence, or become less competent as an evaluator, I should not begin a process that I
expect will mislead me. This allows my beliefs about each topic to reflect the epistemic peaks in my
history on that issue.
So our view makes manifest not only how rational doxastic inertia is possible, but how it is
sensitive to those features of the human condition that made endorsing it attractive. If updating our
beliefs were less costly, if we could easily store arbitrarily many beliefs, or if our memories were perfect,
the extent of rational inertia would be reduced.
It bears emphasis that the list of reasons for and against consideration was not simply
constructed ad hoc to build our abstract motivations for conservatism into the view – each item is, I
think, independently and intuitively plausible as the sort of thing that bears on whether it's worth
considering whether P. That it would, then, have such a tight connection with the very things that
motivate the conservative project would be a coincidence bordering on miraculous unless it were
capturing something very deep about the conservative insight.
5.2 - Passive vs. Active Inertia
One notable feature of dynamic conservatism is that it makes significant the difference
between two kinds of inertia. Active inertia occurs when an agent continues to hold a belief due to the
fact that they already hold it, through active consideration. Passive inertia occurs when an agent continues to
hold a belief due to not reconsidering. On the dynamic picture we have sketched, the only kind of doxastic
inertia which is rational is passive inertia. Dynamic Worth Believing tells us that once we have decided
to consider whether P, we are beholden to the considerations that make P worth believing. And
according to the evidence restriction, only evidence can make P worth believing. So once we are
engaged in active consideration, the mere fact that we already believe something no longer has any
28
weight in determining whether we'd be rational to keep that belief. The view does not, then, license
any kind of active inertia.
In this respect, dynamic conservatism is more modest than some versions of standard
conservatism, which, by allowing mere belief to count in its own favor, rendering it all-thingsconsidered worth having, allow an agent to maintain their belief even when actively considering it, and
indeed, even when aware of the evidential shortcomings of that belief.
One might worry that this makes the view too modest. In some cases of forgotten evidence, it
seems, we do actively consider the question, and find ourselves unable to recall our reasons. And yet
it still seems rational for us to hold on to our beliefs. Because dynamic conservatism does not explain
active inertia, we must turn to other tools, like those appealed to by the evidentialist, to explain these
cases. If we must make this appeal anyway, the worry goes, why not do without dynamic conservatism
altogether?
It is true that a dynamic conservative will use more familiar evidentialist tools to handle these
cases. But that does not mean that it fails to improve on those views. The standard evidentialist
explanation of memory, recall, appeals to second order evidence (about, for instance, the general
reliability of memory). One major problem with this explanation, we saw, was that this sort of evidence
could not contribute to our rationality unless our belief was based on that evidence. So while we could
use this evidence to rationally actively reaffirm our belief, this would not explain our rationality when
we do not perform some such reaffirmation. But this is just to say that evidentialism fails to explain
passive inertia. It is a gap that dynamic conservatism has the perfect shape to fill. So it is
complementary with, and not redundant to, the evidentialist strategy. Moreover, while the evidentialist
cannot explain why agents who lack relevant second order information at all can lose evidence and
rationally maintain their beliefs, the dynamic view can at least explain why such agents can exhibit
passive inertia. The cases the view doesn’t endorse as rational are those where an agent actively reaffirms
29
their belief without relevant second order information. And these are the cases where it is least intuitive
that doxastic inertia is rational. Nevertheless, if these are taken to be core cases, it must be admitted
that this is a genuine disadvantage of the dynamic approach. 17
The distinction between active and passive inertia also lets us see why the dynamic view won’t
explain the rationality of maintaining ordinary beliefs in the face of skeptical challenges, a common
motivation for conservatism we have so far set aside. (Sklar 1975, Lycan 1988, McCain 2008, Poston
2014). We want a way to respond to the skeptic – to justify our belief to her, or to ourselves; to restore
our confidence when we do consider whether a skeptical scenario is true. A view that lets us defy
skepticism only by not thinking about it will not satisfy. This is not to say that a dynamic conservative
can’t respond to the skeptic – but their solution will not flow from their conservatism.
Whether this is a major strike against dynamic conservatism will depend on how seriously one
takes the anti-skeptical ambition. There is good reason to think that the cognitive cost, clutteravoidance, and memory motivations are fundamentally independent of the anti-skeptical hope. The
skeptical problem, after all, appears even for agents who are cognitively flawless – perfect,
instantaneous reasoners with limitless cognitive resources. So the problems that the dynamic view
helps us solve form an interesting and unified class.
Furthermore, I think there is more grounds to be skeptical of the rationality of active belief
perseverance than that of passive perseverance. Any conservative, remember, will want to distinguish
rational inertia from those types of belief perseverance that we criticize as cognitively vicious. And a
characteristic criticism of this sort is an accusation of stubbornness. To be stubborn is not merely to
hold on to a belief despite having, in the background, insufficient evidence for belief; it is to hold on
17
A related worry goes as follows. If whenever one thinks about P, or retrieves a belief from memory, one counts as
considering whether P, then it will be extremely easy to stop the inertia of belief, and we won’t have captured the
interesting cases of forgotten evidence. I mean to use “consideration” in a more robust sense than this. Merely checking
or recalling ones’ belief on a matter is not sufficient to be considering whether P in my sense, which is a more involved
process involving the weighing of evidence. “Deliberation” would be the practical analogue.
30
to that belief in the face of evidential insufficiency. Someone who exhibits merely passive inertia, then,
is immune to charges of epistemic stubbornness in a way someone who exhibits active inertia is not.
Someone who believes in the rationality of active inertia may, of course, have a way of distinguishing
objectionable epistemic stubbornness from acceptable sticking-to-one's-guns. But the fact that by
sacrificing a response to the skeptic, the dynamic picture can easily dismiss a characteristic cognitive
vice as fundamentally different in kind from rational inertia and not merely in degree is a reason to
suspect that its limitation to justifying passive forms of perseverance is a feature, not a bug.
Part VI: The Standard Costs, Revisited
We have seen that the dynamic view can cite the canonical virtues of conservatism in its favor,
and indeed, that it has a better claim to these virtues than the standard view itself. Now we will consider
the costs of the standard view and see whether the same problems arise for dynamic conservatism.
First, we can see that unlike the standard view, dynamic conservatism is consistent with ER.
Notice that the explanation of rational inertia on the dynamic view is crucially different from the one
given by the standard conservative. On that view, an agent was rational to continue believing because
that belief was worth having. That belief had something non-evidentially counting in favor of it. This was a
violation of the evidence restriction. On the dynamic conservative picture, the belief the agent has
need not be worth having. There needn't be anything counting in favor of it. The belief the agent
already had is not related to the belief they have going forward as justifier to justified, or as a reason,
or as a conferrer of epistemic merit of any kind.
This version of conservatism is able to capture ER because by rejecting state-oriented norms
demanding the worthiness of our beliefs, we allow that there are periods of time where what a belief
31
has going for it simply doesn't matter for an agent's rationality. This lets us maintain that the only thing
that counts in favor of a belief is the evidence for it while allowing for rational doxastic inertia.18
It is important to add that if we are skeptical of the evidence restriction for other reasons, we
need not keep it. The dynamic approach is equally handy for those who reject ER but nevertheless
think that mere existing belief is not the right sort of non-evidential consideration to contribute to
beliefworthiness. We may even, if we are perverse, take the dynamic view on board and hold that the
mere fact that one believes something counts in favor of believing it. Dynamic conservatism is
compatible with any view about what makes a belief worth having.
Finally, let us reconsider the three traditional objections to conservatism, as challenges to the
dynamic rather than the standard model of the view.
First, conservatism is accused of having the unacceptable implication that it should be
appropriate to cite the fact that one already believes something when justifying one's belief to others
or deliberating about what to believe. What resources does the dynamic conservative have to respond?
Let us consider the nature of the practices of justification and deliberation. We ask for
justification from others when we are looking for a basis for our own beliefs, or examining the basis
of theirs. Justification, in other words, is paradigmatically a process of demonstrating to others what
is good about what one believes. Deliberation, in turn, is a kind of first-person analogue of justification
– we are identifying and balancing those considerations which bear on the question of what to believe.
That is, we are considering some matter of belief. On our dynamic picture, by the evidence restriction,
the fact that I already believe something does not count in favor of the belief – it is not part of the
basis or the grounds for my belief. It is not, furthermore, something we are allowed to appeal to when
engaged in the process of considering whether to hold the belief. The role of mere belief in rationality
18
It is worth emphasizing a distinction between the dynamic view and a superficially similar view – one that maintains
SWB and claims that mere belief only confers epistemic merit while an agent is not considering. Such a view would not be
consistent with the evidence restriction.
32
is just fundamentally different from that of a justifier of any kind. Unlike the standard conservative,
then, the dynamic conservative is under no pressure to claim that in such practices it is appropriate to
cite the fact of mere belief in favor of the belief itself.
Second, conservatism is accused of licensing bootstrapping, by which a person may, by
irrationally forming a belief, thereby make it rational for him to continue believing it.
It was noted when we introduced this objection that it put the conservative in an especially
awkward position dialectically, since the situation of a person who has formed a belief on insufficient
evidence is, afterwards, the same as one who formed a belief on good evidence and then lost that
evidence. And one of the reasons to favor the conservative approach to memory over preservationism
is that it allows us to maintain that our rationality now does not depend on facts about our distant
history. Since as far as the present is concerned, the rational forgettor and the agent who formed a
belief irrationally are indistinguishable, the conservative who wants to exploit such an internalist
requirement must insist that agents after rational forgetting and irrational formation are on a par. I
accept this as a commitment. Any view that takes internalism seriously will have to do the same. But
I think the sort of “bootstrapping” the dynamic view allows is not of an objectionable sort. Recall that
the dynamic picture licenses only passive inertia. The agent who forms a belief irrationally is later
rational in holding on to that belief, but only as long as he does not reconsider the question. When
she again asks herself whether her belief is correct, she begins a process that ends with her giving up
that belief on pain of irrationality. This does not sound crazy. The really objectionable kind of
bootstrapping comes with views, like standard conservatism, that justify active inertia. On such views,
it seems, an agent could irrationally form a belief, and then keep on actively reaffirming that belief,
thereafter, without repeating their original irrationality. In contrast, the dynamic picture does not allow
mere formation of a belief in a proposition to take that proposition from being unworthy of belief to
33
being worthy of belief, preventing an irrationally formed belief from being actively reaffirmed. So it is
immune to the most serious charges of bootstrapping.
Finally, conservatism is accused of violating a constraint of impartiality by treating the rational
force of our own beliefs asymmetrically from that of the beliefs of others.
It's clear on the standard conservative picture how the asymmetry occurs – my beliefs count
directly in favor of my own beliefs, but yours do not. But what is the asymmetry on our dynamic
picture? Neither my mere beliefs nor anyone else's count directly in favor of the proposition believed.
Nor do they bear on the worthiness of considering whether something is true. In fact, the only way
that the identity of an agent matters to our norms is in identifying whose beliefs are being considered. I treat
my beliefs differently than yours only in the sense that I reconsider my beliefs but I don't reconsider
your beliefs. But to complain that this is objectionably asymmetrical would be absurd. I can't reconsider
your beliefs any more than I can (directly) raise your hand. So the partiality objection cannot even get
off the ground against the dynamic view.
Recapitulation
Let me summarize the case I have presented. Conservatism is attractive for the way it reflects
a proper rational sensitivity to our cognitive limitations. Standard conservatism, however, is associated
with several significant costs – it must reject the well-motivated evidence restriction and it is vulnerable
to several serious independent objections. The conservative is forced to accept the standard version
of the view, however, only if they accept State-oriented Worth Believing. By rejecting SWB, we open
the door to a view on which the relevant norms of rationality govern dynamic processes like
consideration instead of state-oriented attitudes like belief. The dynamic conservatism that emerges
allows us to maintain the evidence restriction, and captures the canonical motivations for conservatism
in a way that is in many respects better than the standard conservative views that originally sought to
exploit them. Furthermore, the dynamic conservative picture is immune to the arguments that threaten
34
standard conservatism. Its failure to secure the conservative ambition of responding to worries about
skepticism is grounded in its rejection of the rationality of active doxastic inertia, of which we have
independent reason to be skeptical. In light of the gains made possible by endorsing a dynamic
approach to the rationality of belief, a project whose potential is yet to be fully explored, the long
philosophical entrenchment of norms like State-oriented Worth Believing would be irrational not to
reconsider.
Acknowledgements
I would like to thank everyone who contributed helpful comments on earlier versions of this paper,
including Stephen Finlay, Nicholas Laskowski, Alida Liberman, Kevin McCain, Michael Milona, Caleb
Perl, Jacob Ross, and Ralph Wedgwood, and especially Mark Schroeder, whose feedback and guidance
were invaluable throughout the paper’s conception, birth, and development.
35
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