Evidentialism

It is plausible that there are epistemic reasons bearing on a distinctively epistemic standard of correctness for belief. It is also plausible that there are a range of practical reasons bearing on what to believe. These theses are often thought to be in tension with each other. Most significantly for our purposes, it is obscure how epistemic reasons and practical reasons might interact in the explanation of what one ought to believe. We draw an analogy with a similar distinction between (...) types of reasons for actions in the context of activities. The analogy motivates a two-level account of the structure of normativity that explains the interaction of correctness-based and other reasons. This account relies upon a distinction between normative reasons and authoritatively normative reasons. Only the latter play the reasons role in explaining what state one ought to be in. All and only practical reasons are authoritative reasons. Hence, in one important sense, all reasons for belief are practical reasons. But this account also preserves the autonomy and importance of epistemic reasons. Given the importance of having true beliefs about the world, our epistemic standard typically plays a key role in many cases in explaining what we ought to believe. In addition to reconciling (versions of) evidentialism and pragmatism, this two-level account has implications for a range of important debates in normative theory, including the interaction of right and wrong reasons for actions and other attitudes, the significance of reasons in understanding normativity and authoritative normativity, the distinction between ‘formal’ and ‘substantive’ normativity, and whether there is a unified source of authoritative normativity. (shrink)

When one has both epistemic and practical reasons for or against some belief, how do these reasons combine into an all-things-considered reason for or against that belief? The question might seem to presuppose the existence of practical reasons for belief. But we can rid the question of this presupposition. Once we do, a highly general ‘Combinatorial Problem’ emerges. The problem has been thought to be intractable due to certain differences in the combinatorial properties of epistemic and practical reasons. Here we (...) bring good news: if we accept an independently motivated version of epistemic instrumentalism—the view that epistemic reasons are a species of instrumental reasons—we can reduce The Combinatorial Problem to a relatively benign problem of how to weigh different instrumental reasons. As an added benefit, the instrumentalist account can explain the apparent intractability of The Combinatorial Problem in terms of a common tendency to think and talk about epistemic reasons in an ‘elliptical’ manner. (shrink)

What is the relationship between faith and evidence? It is often claimed that faith requires going beyond evidence. In this paper, I reject this claim by showing how the moral demands to have faith warrant a person in maintaining faith in the face of counter-evidence, and by showing how the moral demands to have faith, and the moral constraints of evidentialism, are in clear tension with going beyond evidence. In arguing for these views, I develop a taxonomy of different ways (...) of irrationally going beyond evidence and contrast this with rational ways of going against evidence. I then defend instances of having a moral demand to have faith, explore how this stands in tension with going beyond and against evidence, and develop an argument for the claim that faith involves a disposition to go against, but not beyond evidence. (shrink)

I maintain that among the main views concerning the central questions of epistemology (in particular, the question of justified belief) are evidentialism, (Pyrrhonian) scepticism and fideism. In this paper, I first present the arguments in favour of a form of evidentialism, according to which no false belief can be epistemically justified on the basis of evidence. Second, I consider the historical emergence of evidentialism during the period of the early Enlightenment. In particular, I explore the disagreement between Pierre Bayle and (...) Jean-Pierre de Crousaz, which demonstrates the emergence of the modern opposition between evidentialism and fideism. (shrink)

Permissivism is the thesis that, for some body of evidence and a proposition p, there is more than one rational doxastic attitude any agent with that evidence can take toward p. Proponents of uniqueness deny permissivism, maintaining that every body of evidence always determines a single rational doxastic attitude. In this paper, we explore the debate between permissivism and uniqueness about evidence, outlining some of the major arguments on each side. We then consider how permissivism can be understood as an (...) underdetermination thesis, and show how this moves the debate forward in fruitful ways: in distinguishing between different types of permissivism, in dispelling classic objections to permissivism, and in shedding light on the relationship between permissivism and evidentialism. (shrink)

The aim of this book is to answer two important questions about the issue of normativity in epistemology: Why are epistemic reasons evidential, and what makes epistemic reasons and rationality normative? Bondy's argument proceeds on the assumption that epistemic rationality goes hand in hand with basing beliefs on good evidence. The opening chapters defend a mental-state ontology of reasons, a deflationary account of how kinds of reasons are distinguished, and a deliberative guidance constraint on normative reasons. They also argue in (...) favor of doxastic voluntarism—the view that beliefs are subject to our direct voluntary control—and embrace the controversial view that voluntarism bears directly on the question of what kinds of things count as reasons for believing. The final three chapters of the book feature a noteworthy critique of the instrumental conception of the nature of epistemic rationality, as well as a defense of the instrumental normativity of epistemic rationality. The final chapter defends the view that epistemic reasons and rationality are normative for us when we have normative reason to get to the truth with respect to some proposition, and it provides a response to the swamping problem for monistic accounts of value. (shrink)

A superb effort, but in my view Wittgenstein (i.e., philosophy or the descriptive psychology of higher order thought) is not completely understood by anyone, so we can hardly expect Budd, writing in the mid 80’s, without the modern dual systems of thought view, and no comprehensive logical structure of rationality, to have grasped him completely. Like everyone, he does not get that W’s use of the word ‘grammar’ refers to our innate Evolutionary Psychology and the general framework of Wittgenstein’s and (...) Searle’s work since laid out (e.g., in my recent articles) was unavailable to him. Nevertheless, he does a good job and nicely complements the work by Johnston (Wittgenstein: Rethinking the Inner) which I have also reviewed. Budd’s summary is a fitting end to the book (p165). “The repudiation of the model of ‘object and designation’ for everyday psychological words—the denial that the picture of the inner process provides a correct representation of the grammar of such words, is not the only reason for Wittgenstein’s hostility to the use of introspection in the philosophy of psychology. But it is its ultimate foundation.” -/- An excellent study, but in my view, like them all, it falls short of a full appreciation of W as I explain here and in my other reviews. -/- Those wishing a comprehensive up to date framework for human behavior from the modern two systems view may consult my book ‘The Logical Structure of Philosophy, Psychology, Mind and Language in Ludwig Wittgenstein and John Searle’ 2nd ed (2019). Those interested in more of my writings may see ‘Talking Monkeys--Philosophy, Psychology, Science, Religion and Politics on a Doomed Planet--Articles and Reviews 2006-2019 3rd ed (2019), The Logical Structure of Human Behavior (2019), and Suicidal Utopian Delusions in the 21st Century 4th ed (2019) . (shrink)

The standard reliabilist line on defeat is open to counterexamples regarding its necessity and sufficiency. In this paper, I present three problems for the standard reliabilist line from the recent literature on defeat before arguing that reliabilists can solve those problems by adopting an account of justification that ties defeat to the evidence possessed by the relevant agent. In doing so, I show that there is a conception of having evidence that reliabilists can adopt without giving up on the core (...) commitments of their research program, namely the reduction of epistemic facts and having a psychologically realistic account of justification. My account of defeat draws on the account of propositional justification, transglobal evidentialism, defended by David Henderson, Terry Horgan, and Matjaž Potrč. (shrink)

Evidentialism has shown itself to be an important research program in contemporary epistemology, with evidentialists giving theories of virtually every important topic in epistemology. Nevertheless, at the heart of evidentialism is a handful of concepts, namely evidence, evidence possession, and evidential fit. If evidentialists cannot give us a plausible account of these concepts, then their research program, with all its various theories, will be in serious trouble. In this paper, I argue that evidentialists has yet to give a plausible account (...) of evidence possession and the prospects for doing so are dim. (shrink)

Evidentialism and Reliabilism are two of the main contemporary theories of epistemic justification. Some authors have thought that the theories are not incompatible with each other, and that a hybrid theory which incorporates elements of both should be taken into account. More recently, other authors have argued that the resulting theory is well- placed to deal with fine-grained doxastic attitudes (credences). In this paper I review the reasons for adopting this kind of hybrid theory, paying attention to the case of (...) credences and the notion of probability involved in their treatment. I argue that the notion of probability in question can only be an epistemic (or evidential) kind of probability. I conclude that the resulting theory will be incompatible with Reliabilism in one important respect: it cannot deliver on the reductivist promise of Reliabilism. I also argue that attention to the justification of basic beliefs reveals limitations in the Evidentialist framework as well. The theory that results from the right combination of Evidentialism and Reliabilism, therefore, is neither Evidentialist nor Reliabilist. (shrink)

In this paper, I articulate and discuss Clifford's two main arguments in favor of the norm that it is illegitimate to believe based on insufficient evidence. The first argument appeals to the instrumental value of belief, and the second one appeals to our intrinsic interest in the truth. Both arguments bring to the fore the relevance of moral and social factors to determine norms for belief. I sustain that the first argument is insufficient to establish Clifford's norm in general. Beliefs (...) that are not a mean to an action fall outside the scope of the first argument. The second argument has a wider scope. However, it can be undermined if the agent follows an intellectualized norm that aims to protect the rest of her cognitive and active life from her unjustified beliefs. It’s an empirical matter whether a human agent is able to follow this norm. I defend that Clifford’s norm should be reformulated, including some parameters that have influence on the sufficiency of evidence. Finally, prudential and moral factors can affect the legitimacy of belief. It’s legitimate to believe without sufficient evidence only in special cases, when the agent insulates the unjustified belief, or when the good that results from believing surpasses the harms yielded by credulity. (shrink)

First-order evidence is evidence which bears on whether a proposition is true. Higher-order evidence is evidence which bears on whether a person is able to assess her evidence for or against a proposition. A widespread view is that higher-order evidence makes a difference to whether it is rational for a person to believe a proposition. In this paper, I consider in what way higher-order evidence might do this. More specifically, I consider whether and how higher-order evidence plays a role in (...) determining what it is rational to believe distinct from that which first-order evidence plays. To do this, I turn to the theory of reasons, and try to situate higher-order evidence within it. The only place I find for it there, distinct from that which first-order evidence already occupies, is as a practical reason, that is, as a reason for desire or action. One might take this to show either that the theory of reasons is inadequate as it stands or that higher-order evidence makes no distinctive difference to what it is rational to believe. I tentatively endorse the second option. (shrink)

In a recent work, Walter Carnielli and Abilio Rodrigues present an epistemically motivated interpretation of paraconsistent logic. In their view, when there is conflicting evidence with regard to a proposition A (i.e. when there is both evidence in favor of A and evidence in favor of ￢A) both A and ￢A should be accepted without thereby accepting any proposition B whatsoever. Hence, reasoning within their system intends to mirror, and thus, should be constrained by, the way in which we reason (...) about evidence. In this article we will thoroughly discuss their position and suggest some ways in which this project can be further developed. The aim of the paper is twofold. On the one hand, we will present some philosophical critiques to the specific epistemic interpretation of paraconsistent logic proposed by Carnielli & Rodrigues. First, we will contend that Carnielli & Rodrigues’s interpretation implies a thesis about what evidence rationally justifies to accept or believe, called Extreme Permissivism, which is controversial among epistemologists. Second, we will argue that what agents should do, from an epistemic point of view, when faced with conflicting evidence, is to suspend judgment. On the other hand, despite these criticisms we do not believe that the epistemological motivation put forward by Carnielli & Rodrigues is entirely wrong. In the last section, we offer an alternative way in which one might account for the epistemic rationality of accepting contradictions and, thus, for an epistemic understanding of paraconsistency, which leads us to discuss the notion of diachronic epistemic rationality. (shrink)

Certaines croyances sont justifiées tandis que d’autres ne le sont pas. Si je crois que la Terre est ronde, on peut considérer que ma croyance est justifiée, alors que si je crois qu’elle est plate, elle ne l’est pas. Qu’est-ce qui différencie les unes des autres ? Une croyance justifiée doit-elle toujours être fondée sur une autre croyance justifiée ? Comment pouvons-nous éviter la conclusion sceptique selon laquelle nous ne sommes pas justifiés à croire quoi que ce soit ? Ces (...) questions classiques se trouvent encore aujourd’hui au centre de débats en épistémologie. Cette entrée présente une introduction aux discussions centrales concernant les conditions et la forme de la justification de nos croyances. (shrink)

There is much to like about the idea that justification should be understood in terms of normality or normic support (Smith 2016, Goodman and Salow 2018). The view does a nice job explaining why we should think that lottery beliefs differ in justificatory status from mundane perceptual or testimonial beliefs. And it seems to do that in a way that is friendly to a broadly internalist approach to justification. In spite of its attractions, we think that the normic support view (...) faces two serious challenges. The first is that it delivers the wrong result in preface cases. These cases suggest that the view is either too sceptical or too externalist. The second is that the view struggles with certain kinds of Moorean absurdities. It turns out that these problems can easily be avoided. If we think of normality as a condition on *knowledge*, we can characterise justification in terms of its connection to knowledge and thereby avoid the difficulties discussed here. The resulting view does an equally good job explaining why we should think that our perceptual and testimonial beliefs are justified when lottery beliefs cannot be. Thus, it seems that little could be lost and much could be gained by revising the proposal and adopting a view on which it is knowledge, not justification, that depends directly upon normality. (shrink)

Explanationism holds that a person's evidence supports a proposition just in case that proposition is part of the best available explanation for the person's evidence. I argue that explanationism faces a serious difficulty when it comes to justified beliefs about the future. Often, one's evidence supports some proposition about the future but that proposition is not part of the best available explanation for one's evidence. Attempts to defend explanationism against this charge are unattractive. Moving to a modified better contrastive explanation (...) account will help with these cases, but it will face other difficulties. (shrink)

What the rational thing to do in the face of disagreement by an epistemic peer is has been much discussed recently. Those who think that a peer’s disagreement is itself evidence against one’s belief, as many do, are committed to a special form of epistemic dependence. If such disagreement is really evidence, it seems reasonable to take it into account and to adjust one’s belief accordingly. But then it seems that the belief one ends up with depends, in part, on (...) what someone else believes, even if one does not know why that someone believes what he does. While the practical impossibility of finding actual cases of peer disagreement has been often noted, its conceptual possibility has gone unquestioned. Here we challenge this consensus and argue, first, that, strictly speaking, peer disagreement is impossible and, second, that cases of – all-too-common – near-peer disagreement present no special puzzle and require nothing more than adhering to standard principles of sensible epistemic conduct. In particular, we argue that in such cases there is no good reason to adopt the widely accepted principle that evidence of evidence is evidence. If so, even if one takes a near-peer’s disagreement as a reason for reexamining one’s belief, one is not epistemically dependent in the sense one would be if that disagreement were evidence concerning the matter in question. (shrink)

Metacognition is the monitoring and controlling of cognitive processes. I examine the role of metacognition in ‘ordinary retrieval cases’, cases in which it is intuitive that via recollection the subject has a justified belief. Drawing on psychological research on metacognition, I argue that evidentialism has a unique, accurate prediction in each ordinary retrieval case: the subject has evidence for the proposition she justifiedly believes. But, I argue, process reliabilism has no unique, accurate predictions in these cases. I conclude that ordinary (...) retrieval cases better support evidentialism than process reliabilism. This conclusion challenges several common assumptions. One is that non-evidentialism alone allows for a naturalized epistemology, i.e., an epistemology that is fully in accordance with scientific research and methodology. Another is that process reliabilism fares much better than evidentialism in the epistemology of memory. (shrink)

This paper argues that there is a problem for the justificatory significance of perceptions that has been overlooked thus far. Assuming that perceptual experiences are propositional attitudes and that only propositional attitudes which assertively represent the world can function as justifiers, the problem consists in specifying what it means for a propositional attitude to assertively represent the world without losing the justificatory significance of perceptions—a challenge that is harder to meet than might first be thought. That there is such a (...) problem can be seen by reconsidering and modifying a well-known argument to the conclusion that beliefs cannot be justified by perceptions but only by other beliefs. Nevertheless, the aim of the paper is not to conclude that perceptions are actually incapable of justifying our beliefs but rather to highlight an overlooked problem that needs to be solved in order to properly understand the justificatory relationship between perceptions and beliefs. (shrink)

Epistemic Justification We often believe what we are told by our parents, friends, doctors, and news reporters. We often believe what we see, taste, and smell. We hold beliefs about the past, the present, and the future. Do we have a right to hold any of these beliefs? Are any supported by evidence? Should we … Continue reading Justification, Epistemic →.

Review of Littlejohn, "Justification and the Truth Connection".

What distinguishes Reidian externalism from other versions of epistemic externalism about justification is its proper functionalism and its commonsensism, both of which are inspired by the 18th century Scottish philosopher Thomas Reid. Its proper functionalism is a particular analysis of justification; its commonsensism is a certain thesis about what we are noninferentially justified in believing.

In this paper I argue against what I call ‘strict evidentialism’, the view that evidence is the sole factor for determining the normative status of beliefs. I argue that strict evidentialism fails to capture the uniquely subjective standpoint of believers and as a result it fails to provide us with the tools necessary to apply its own epistemic norms. In its place I develop an interest-relative theory of justification which I call quasi-evidentialism, according to which S has a justified belief (...) that P at time t if and only if S’s evidence at time t supports P in proportion to S’s interest in P. I take interests as fixed and argue that adjusting our confidence in a proposition in the right way, given our interests, is fine-tuned through the exercise of intellectual virtue, in particular the virtue of epistemic conscientiousness. This theory refocuses epistemic responsibility in the subject and by locating agency in the cultivation of epistemic virtue it also provides a handy solution to the problem of doxastic voluntarism, insofar as the development of our epistemic virtue guides our responsiveness to reason. (shrink)

In recent years, permissivism—the claim that a body of evidence can rationalize more than one response—has enjoyed somewhat of a revival. But it is once again being threatened, this time by a host of new and interesting arguments that, at their core, are challenging the permissivist to explain why rationality matters. A version of the challenge that I am especially interested in is this: if permissivism is true, why should we expect the rational credences to be more accurate than the (...) irrational ones? My aim is to turn this challenge on its head and argue that, actually, those who deny permissivism will have a harder time responding to such a challenge than those who accept it. (shrink)

Epistemic deontology maintains that our beliefs and degrees of belief are open to deontic evaluations—evaluations of what we ought to believe or may not believe. Some philosophers endorse strong internalist versions of epistemic deontology on which agents can always access what determines the deontic status of their beliefs and degrees of belief. This paper articulates a new challenge for strong internalist versions of epistemic deontology. Any version of epistemic deontology must face William Alston’s argument. Alston combined a broadly voluntarist conception (...) of responsibility, on which ought implies can, with doxastic involuntarism, the position that our beliefs are not under our control. Together, those views imply that epistemic deontology is false. A promising response to Alston’s argument is to embrace a compatibilist account of control—specifically a reason-responsive version of compatibilism—and use it to criticism his doxastic involuntarism. I argue that while reason-responsive compatibilism about control does undermine Alston’s argument, it comes at a cost. Specifically, it is inconsistent with strong internalist versions of epistemic deontology. The surprising upshot is that so long as we retain a voluntarist conception of responsibility, we have reason for rejecting strong internalist versions of epistemic deontology. (shrink)

It is often claimed that Plato’s definition of knowledge as “true opinion with an account” is in agreement with the contemporary analysis of knowledge as “justified true belief”. Some scholars disagree with the attribution of JTB to Plato. I analyze three influential arguments against the assumption of Plato’s agreement with JTB, and refute them. Then I provide my own argument against the assumption. I argue that the contemporary interpretation of the JTB formula understands “belief” not in the sense of an (...) “opinion,” but rather of a “degree of confidence.” Accordingly, “justification” is understood not as applying to the opinion itself, but rather to the person having a certain degree of confidence. I support this claim by showing the difference between the traditional and the contemporary understanding of “evidence,” the former referring to a property of the proposition, while the latter meaning the body of reasons, which supports the person’s confidence to a certain degree. Thus, I conclude that Plato understands knowledge as “correct opinion validated by a rational explanation,” and it has very little in common with the contemporary understanding of knowledge as “sufficiently supported subjective degree of confidence in the truth of a proposition.”. (shrink)

This paper argues that treating James' "The Will to Believe" as a defense of prudential reasoning about belief seriously misrepresents it. Rather than being a precursor to current defenses of prudential arguments, James paper has, if anything, more affinities to certain prominent strains in contemporary naturalized epistemology.

Critics and defenders of William James both acknowledge serious tensions in his thought, tensions perhaps nowhere more vexing to readers than in regard to his claim about an individual’s intellectual right to their “faith ventures.” Focusing especially on “Pragmatism and Religion,” the final lecture in Pragmatism, this chapter will explore certain problems James’ pragmatic pluralism. Some of these problems are theoretical, but others concern the real-world upshot of adopting James permissive ethics of belief. Although Jamesian permissivism is qualified in certain (...) ways in this paper, I largely defend James in showing how permissivism has philosophical advantages over the non-permissivist position associated with evidentialism. These advantages include not having to treat disagreement as a sign of error or irrationality, and mutual support relations between permissivism and what John Rawls calls the "reasonable pluralism" at the heart of political liberalism. (shrink)

Evidentialism as Earl Conee and Richard Feldman present it is a philosophy with distinct aspects or sides: Evidentialism as a conceptual analysis of epistemic justification, and as a prescriptive ethics of belief. I argue that Conee and Feldman's ethics of belief has 'weak roots and sour fruits.' It has weak roots because it is premised on their account of justification qua synchronic rationality, and I undercut this account. It has sour fruits because the austere evidentialist ethic of belief is unable (...) to support reasonable disagreement, and eventuates in prescribing agnosticism in most cases of disagreement. I contrast this with John Rawls' understanding of "reasonable pluralism" and of the many sources of faultless disagreement over what Rawls termed comprehensive conceptions of the good. (shrink)

The Uniqueness thesis says that any body of evidence E uniquely determines which doxastic attitude is rationally permissible regarding some proposition P. Permissivists deny Uniqueness. They are charged with arbitrarily favouring one doxastic attitude out of the set of attitudes they regard as rationally permissible. Simpson (Episteme, 2017) claims that an appeal to differences in cognitive abilities can remove the arbitrariness. I argue that it can't. Impermissivists face a challenge of their own: The problem of fine distinctions. I suggest that (...) meeting this challenge requires impermissivists to loosen up at higher levels – when comparing belief-forming systems that differ in the fineness of their doxastic outputs. This more relaxed take on Uniqueness is a kind of ‘intraspecies impermissivism’. (shrink)

It has been argued that an epistemically rational agent’s evidence is subjectively mediated through some rational epistemic standards, and that there are incompatible but equally rational epistemic standards available to agents. This supports Permissiveness, the view according to which one or multiple fully rational agents are permitted to take distinct incompatible doxastic attitudes towards P (relative to a body of evidence). In this paper, I argue that the above claims entail the existence of a unique and more reliable epistemic standard. (...) My strategy relies on Condorcet’s Jury Theorem. This gives rise to an important problem for those who argue that epistemic standards are permissive, since the reliability criterion is incompatible with such a type of Permissiveness. (shrink)

This paper discusses the ability of explanationist theories of epistemic justification to account for the justification we have for holding beliefs about the future. McCain’s explanationist account of the relation of evidential support is supposedly in a better position than other theories of this type to correctly handle cases involving beliefs about the future. However, the results delivered by this account have been questioned by Byerly and Martin. This paper argues that McCain’s account is, in fact, able to deliver plausible (...) results in cases involving such beliefs and that explanationism, if properly articulated, is illuminating with respect to the justification we have for holding such beliefs, as it manages to correctly distinguish evidence that only supports believing probabilistic claims about the future from evidence that is sufficient to believe that a particular event will happen. (shrink)

In this paper, I present a puzzle about epistemic rationality. It seems plausible that it should be rational to believe a proposition if you have sufficient evidential support for it. It seems plausible that it rationality requires you to conform to the categorical requirements of rationality. It also seems plausible that our first-order attitudes ought to mesh with our higher-order attitudes. It seems unfortunate that we cannot accept all three claims about rationality. I will present three ways of trying to (...) resolve this tension and argue that the best way to do this is to reject the idea that strong evidential support is the stuff rationality is made of. In the course of doing this, I shall argue that there is a special class of propositions about the requirements of rationality that we cannot make rational mistakes about and explain how this can be. (shrink)

Evidentialism is an internalist view (or family of views) about epistemic justification saying that a subject s’s epistemic justification entirely depends on the evidence at her disposal. In order to distil a complete theory of epistemic justification from this general principle it is necessary to answer three main questions. What kind of entities constitute a subject’s evidence? What does it take for a piece of evidence E to support a proposition P? What does it take for a subject s to (...) possess E? In this entry I describe the main answers defended in the literature in response to these three questions, and critically discuss the main objections that have been raised against evidentialism, both at a general level and as targeting more specific variants of it. (shrink)

Response to Horgan, Goldman, and Graham. Part of a book symposium on my _Perception and Basic Beliefs_.

Naturalism is normally taken to be an ideology, censuring non-naturalistic alternatives. But as many critics have pointed out, this ideological stance looks internally incoherent, since it is not obviously endorsed by naturalistic methods. Naturalists who have addressed this problem universally foreswear the normative component of naturalism by, in effect, giving up science’s exclusive claim to legitimacy. This option makes naturalism into an empty expression of personal preference that can carry no weight in the philosophical or political spheres. In response to (...) this dilemma, I argue that on a popular construal of naturalism as a commitment to inference to the best explanation, methodological naturalism can be both normative and internally coherent. (shrink)

Recently, several epistemologists have defended an attractive principle of epistemic rationality, which we shall call Ur-Prior Conditionalization. In this essay, I ask whether we can justify this principle by appealing to the epistemic goal of accuracy. I argue that any such accuracy-based argument will be in tension with Evidence Externalism, i.e., the view that agent's evidence may entail non-trivial propositions about the external world. This is because any such argument will crucially require the assumption that, independently of all empirical evidence, (...) it is rational for an agent to be certain that her evidence will always include truths, and that she will always have perfect introspective access to her own evidence. This assumption is in tension with Evidence Externalism. I go on to suggest that even if we don't accept Evidence Externalism, the prospects for any accuracy-based justification for Ur-Prior Conditionalization are bleak. (shrink)

Two common claims in philosophy are that deep disagreements cannot, in principle, be resolved by argument and that normal disagreements will be resolved by argument. In each claim it is assumed that the parties to the disagreement are rational. I argue that both claims are false. The first fails to take account of refutations. The second fails to recognise the role of conjectures in the dynamics of the growth of knowledge. There is no disagreement such that it is impossible for (...) rational parties to reach agreement by argument; but there is also no disagreement for which parties are rationally required to reach agreement by argument. Given the same evidence, it may be rational for one person to believe a specific proposition and another to believe its negation. (shrink)