According to David Lewis’s contextualist analysis of knowledge, there can be contexts in which a subject counts as knowing a proposition just because every possibility that this proposition might be false is irrelevant in those contexts. In this paper I argue that, in some cases at least, Lewis’ analysis results in granting people non-evidentially based knowledge of ordinary contingent truths which, intuitively, cannot be known but on the basis of appropriate evidence.

Defenders of pragmatic theories of knowledge (such as contextualism and sensitive invariantism) argue that these theories, unlike those that invoke a single standard for knowledge, comport with the intuitively compelling thesis that knowledge is the norm of assertion and practical reason. In this paper, I dispute this thesis, and argue that, therefore, the prospects for both “high standard” approach, and contend that if one abandons the thesis that knowledge is the norm of assertion and practical reason, the most serious arguments (...) against it lose force. (shrink)

DeRose appeals to ordinary English usage to support his contextualist semantics for "know"-attributions. A common objection holds that though the relevant assertions are both appropriate and seemingly true, their seeming truth arises merely from their appropriateness. This Warranted Assertability Maneuver (WAM) aims to provide a stand-alone objection by providing a reason not to take the ordinary language data at face-value. However, there is no plausible model or mechanism for the pragmatic phenomena WAMmers must postulate. Given what the WAM requires, it (...) is doubtful it could work out in detail. (shrink)

According to the Dogmatism Puzzle, knowledge breeds dogmatism: if a subject knows a proposition h, then she is justified in disregarding any future evidence against h, for she knows that such evidence is misleading. The standard, widely accepted, solution to the puzzle appeals to the defeasibility of knowledge. I argue that the defeat solution leaves intact a residual dogmatist puzzle. Solving this puzzle requires proponents of defeat to deny a plausible principle that the original puzzle relies on called Entitlement, a (...) principle stating roughly that knowing that a piece of evidence is misleading entitles one to disregard it. The plausibility of Entitlement should cast doubt not only on the defeat solution, but on an assumption that has often been taken for granted: the falsity of the dogmatist conclusion of the original puzzle. I conclude that we face a dilemma between giving up Entitlement and living with dogmatism. (shrink)

Certain well-known intuitions suggest that, contrary to traditional thinking in epistemology, knowledge judgements are shifty—i.e., that judgements about whether somebody knows something can shift in stringency with context. Some take these intuitions to show that knowledge judgements are shifty. Jennifer Nagel and Mikkel Gerken have argued, however, that closer attention to the psychological processes which underlie knowledge judgements shows how traditional non-shifty thinking can be preserved. They each defend moderate classical invariantism—the view that the epistemic standard for knowing is always (...) moderate—by drawing on recent work in cognitive psychology. This paper argues that neither attempt succeeds. (shrink)

We have the duty to object to things that people say. If you report something that I take to be false, unwarranted, or harmful, I may be required to say as much. In this paper, I explore how to best understand the distinctively epistemic dimension of this duty. I begin by highlighting two central features of this duty that distinguish it from others, such as believing in accordance with the evidence or promise‐keeping. In particular, I argue that whether we are (...) obligated to object is directly influenced not only by what other relevant members of the conversational context or community do, but also by the social status of the agent in question. I then show that these features are shared by the duty to be charitable, and the similarities between these two duties point to a potentially deeper explanation: while promise‐keeping is regarded as a classic perfect duty, charity is an imperfect one. I then argue that the duty to object can be modeled on a particular conception of imperfect duties, one that takes the duty to belong to communities and other collectives, rather than to individuals. I conclude by showing that this framework provides us with reason for accepting that there are imperfect epistemic duties in general. (shrink)

This paper argues that the standard evidence for the knowledge norm of assertion can be extended to provide evidence for a corresponding knowledge norm of blame.

In this paper I offer a critique of the recent popular strategy of giving a contextualist account of vagueness. Such accounts maintain that truth-values of vague sentences can change with changes of context induced by confronting different entities (e.g. different pairs through a sorites series). I claim that appealing to context does not help in solving the sorites paradox, nor does it give us new insights into vagueness per se. Furthermore, the contextual variation to which the contextualist is committed is (...) problematic in various ways. For example, it yields the consequence that much of our everyday (non-soritical) reasoning is fallacious, and it renders us ignorant of what we and others have said. (shrink)

In disputes about conceptual analysis, each side typically appeals to pre-theoretical 'intuitions' about particular cases. Recently, many naturalistically oriented philosophers have suggested that these appeals should be understood as empirical hypotheses about what people would say when presented with descriptions of situations, and have consequently conducted surveys on non-specialists. I argue that this philosophical research programme, a key branch of what is known as 'experimental philosophy', rests on mistaken assumptions about the relation between people's concepts and their linguistic behaviour. The (...) conceptual claims that philosophers make imply predictions about the folk's responses only under certain demanding, counterfactual conditions. Because of the nature of these conditions, the claims cannot be tested with methods of positivist social science. We are, however, entitled to appeal to intuitions about folk concepts in virtue of possessing implicit normative knowledge acquired through reflective participation in everyday linguistic practices. (shrink)

I discuss Richard Swinburne’s account of religious experience in his probabilistic case for theism. I argue, pace Swinburne, that even if cosmological considerations render theism not too improbable, religious experience does not render it more probable than not.

Craig casts doubt upon the project of trying to give the traditional sort of necessary and sufficient conditions for A knows that p. He interprets the inadequacy of existing analyses of knowledge as evidence that our concept of knowledge is complex and diffuse, and concludes that we should aim to understand it by thinking about the rôle the concept plays in our lives, rather than by trying to find necessary and sufficient conditions for the truth of knowledge ascriptions.There is surely (...) something right about Craig's view: we are unlikely to succeed in any attempt to analyse away the intricacies in our concept of knowledge. We cannot realistically hope to uncover a set of necessary and sufficient conditions for A knows that p which are in all cases either clearly satisfied or clearly not satisfied. Nor, I suspect, is it possible to offer necessary and sufficient conditions for knowledge which are widely accepted as being more securely understood than knowledge itself. (shrink)

This paper explains what’s wrong with a Hume-inspired argument for skepticism about induction. Hume’s argument takes as a premise that inductive reasoning presupposes that the future will resemble the past. I explain why that claim is not plausible. The most plausible premise in the vicinity is that inductive reasoning from E to H presupposes that if E then H. I formulate and then refute a skeptical argument based on that premise. Central to my response is a psychological explanation for how (...) people judge that if E then H without realizing that they thereby settled the matter rationally. (shrink)

A sensible epistemologist may not see how she could know that she is not a brain in a vat ; but she doesn’t panic. She sticks with her empirical beliefs, and as that requires, believes that she is not a BIV. (She does not inferentially base her belief that she is not a BIV on her empirical knowledge—she rejects that ‘Moorean’ response to skepticism.) Drawing on the psychological literature on metacognition, I describe a mechanism that’s plausibly responsible for a sensible (...) epistemologist coming to believe she is not a BIV. I propose she thereby knows that she is not a BIV. The particular belief-forming mechanism employed explains why she overlooks this account of how she knows she is not a BIV, making it seem that there is no way for her to know it. I argue this proposal satisfactorily resolves the skeptical puzzle. (shrink)

Belief-credence dualism is the view that we have both beliefs and credences and neither attitude is reducible to the other. Pragmatic encroachment is the view that practical stakes can affect the epistemic rationality of states like knowledge or justified belief. In this paper, I argue that dualism offers a unique explanation of pragmatic encroachment cases. First, I explain pragmatic encroachment and what motivates it. Then, I explain dualism and outline a particular argument for dualism. Finally, I show how dualism can (...) explain the intuitions that underlie pragmatic encroachment. My basic proposal is that in high-stakes cases, it is not that one cannot rationally believe that p; instead, one ought not to rely on one's belief that p. One should rather rely on one's credence in p. I conclude that we need not commit ourselves to pragmatic encroachment in order to explain the intuitiveness of the cases that motivate it. (shrink)

This paper will articulate and defend a novel theory of epistemic justification; I characterize my view as the thesis that justification is potential knowledge . My project is an instance of the ‘knowledge-first’ programme, championed especially by Timothy Williamson. So I begin with a brief recapitulation of that programme.

Hyman (1999, 2006) argues that knowledge is best conceived as a kind of ability: S knows that p iff S can φ for the reason that p. Hyman motivates this thesis by appealing to Gettier cases. I argue that it is counterexampled by a certain kind of Gettier case where the fact that p is a cause of the subject’s belief that p. One can φ for the reason that p even if one does not know that p. So knowledge (...) is not best conceived as an ability of this kind. (shrink)

Epistemic closure has been a central issue in epistemology over the last forty years. According to versions of the relevant alternatives and subjunctivist theories of knowledge, epistemic closure can fail: an agent who knows some propositions can fail to know a logical consequence of those propositions, even if the agent explicitly believes the consequence (having “competently deduced” it from the known propositions). In this sense, the claim that epistemic closure can fail must be distinguished from the fact that agents do (...) not always believe, let alone know, the consequences of what they know—a fact that raises the “problem of logical omniscience” that has been central in epistemic logic. This paper, part I of II, is a study of epistemic closure from the perspective of epistemic logic. First, I introduce models for epistemic logic, based on Lewis’s models for counterfactuals, that correspond closely to the pictures of the relevant alternatives and subjunctivist theories of knowledge in epistemology. Second, I give an exact characterization of the closure properties of knowledge according to these theories, as formalized. Finally, I consider the relation between closure and higher-order knowledge. The philosophical repercussions of these results and results from part II, which prompt a reassessment of the issue of closure in epistemology, are discussed further in companion papers. As a contribution to modal logic, this paper demonstrates an alternative approach to proving modal completeness theorems, without the standard canonical model construction. By “modal decomposition” I obtain completeness and other results for two non-normal modal logics with respect to new semantics. One of these logics, dubbed the logic of ranked relevant alternatives, appears not to have been previously identified in the modal logic literature. More broadly, the paper presents epistemology as a rich area for logical study. (shrink)

The truth of skepticism would be depressing and impractical. Our beliefs would be groundless, we would know nothing (or almost nothing) about the world around us, and epistemic success would likely be impossible. But do these negative consequences have any bearing on the truth of skepticism? According to many scholars, they do not. The impractical consequences of skepticism are typically regarded as orthogonal to its truth. For this reason, pragmatic resolutions to skepticism are regularly dismissed. I will argue, however, that (...) skepticism is implausible because it is impractical. In particular, skepticism is implausible because it goes against the point of epistemic evaluation. (shrink)

Drawing on new empirical data, a group of experimental philosophers have argued that one of the most popular and influential forms of skepticism is much less interesting and much less worrisome than philosophers have thought. Contrary to this claim, I argue that this brand of skepticism remains as threatening as ever. My argument also reveals an important limitation of experimental philosophy and sheds light on the way professional philosophers should go about the business of doing philosophy.

This is the second book by Baz that aims to show that a big chunk of contemporary philosophy is fundamentally misguided. His first book, When Words Are Called For: A Defense of Ordinary Language Philosophy (2012) adopted a therapeutic approach (in the Wittgensteinian style) to problems in contemporary epistemology, arguing that when properly thought through, the way philosophers talk about ‘knowing’ that something is the case ultimately does not make sense. Baz’s goal in his second book is less therapeutic and (...) more constructive: he aims to start a methodological revolution (in the Kuhnian sense)—to shake contemporary philosophers out of the unconscious habits of normal science and provoke them into making a radical change in the methods they use to do philosophy and the basic assumptions that motivate those methods. (shrink)

This paper is about the ‘threshold problem’ for knowledge, namely, how do we determine what fixes the level of justification required for knowledge in a non-arbitrary way? One popular strategy for solving this problem is impurism, which is the view that the required level of justification is partly fixed by one’s practical reasoning situation. However, this strategy has been the target of several recent objections. My goal is to propose a new version of impurism that solves the threshold problem without (...) succumbing to these criticisms. (shrink)

It is a widely shared intuition that there is a close connection between knowledge-how and intentional action. In this paper, I explore one aspect of this connection: the normative connection between intending to do something and knowing how to do it. I argue for a norm connecting knowledge-how and intending in a way that parallels the knowledge norms of assertion, belief, and practical reasoning, which I call the knowledge-how norm of Intention. I argue that this norm can appeal to support (...) from arguments which parallel those for other epistemic norms, that it can deal with a number of prima facie problem cases, and that alternative conditions in a norm on intention are implausible. (shrink)

In this paper I consider the prospects for an epistemic norm which relates knowledge-how to showing in a way that parallels the knowledge norm of assertion. In the first part of the paper I show that this epistemic norm can be motivated by conversational evidence, and that it fits in with a plausible picture of the function of knowledge. In the second part of the paper I present a dilemma for this norm. If we understand showing in a broad sense (...) as a general kind of skill teaching, then the norm faces counterexamples of teachers who know how to teach, but not to do. On the other hand, it we understand showing more narrowly as involving only teaching by doing the relevant activity, then the data which initially supported the norm can be explained away by more general connections between knowledge-how and intentional action. (shrink)

Among philosophers of science there seems to be a general consensus that understanding represents a species of knowledge, but virtually every major epistemologist who has thought seriously about understanding has come to deny this claim. Against this prevailing tide in epistemology, I argue that understanding is, in fact, a species of knowledge: just like knowledge, for example, understanding is not transparent and can be Gettiered. I then consider how the psychological act of "grasping" that seems to be characteristic of understanding (...) differs from the sort of psychological act that often characterizes knowledge. Zagzebski's account Kvanvig's account Two problems Comanche cases Unreliable sources of information The upper-right quadrant So is understanding a species of knowledge? A false choice. (shrink)

In this paper I argue that defeasible inferences are occasion-sensitive: the inferential connections of a given claim depend on features of the circumstances surrounding the occasion of inference. More specifically, it is an occasion-sensitive matter which possible defeaters have to be considered explicitly by the premises of an inference and which possible defeaters may remain unconsidered, without making the inference enthymematic. As a result, a largely unexplored form of occasion-sensitivity arises in inferentialist theories of content that appeal to defeasible inferences.

We discuss the role of practical costs in the epistemic justification of a novice choosing expert advice, taking as a case study the choice of an expert statistician by a lay politician. First, we refine Goldman’s criteria for the assessment of this choice, showing how the costs of not being impartial impinge on the epistemic justification of the different actors involved in the choice. Then, drawing on two case studies, we discuss in which institutional setting the costs of partiality can (...) play an epistemic role. This way we intend to show how the sociological explanation of the choice of experts can incorporate its epistemic justification. (shrink)

This paper develops a normative account of epistemic luck, according to which the luckiness of epistemic luck is analyzed in terms of the expectations a subject is entitled to have when she satisfies the standards of epistemic justification. This account enables us to distinguish three types of epistemic luck—bad, good, and sheer—and to model the roles they play e.g. in Gettierization. One controversial aspect of the proposed account is that it is non‐reductive. While other approaches analyze epistemic luck in non‐epistemic (...) terms—either in modal terms (lack of safety) or in agential terms (lack of creditworthiness)—I argue that the non‐reductive nature of the normative account is actually a selling‐point relative to its competitors. (shrink)

It has been alleged that the demands of friendship conflict with the norms of epistemology—in particular, that there are cases in which the moral demands of friendship would require one to give a friend the benefit of the doubt, and thereby come to believe something in violation of ordinary epistemic standards on justified or responsible belief :329–351, 2004; Stroud in Ethics 116:498–524, 2006; Hazlett in A luxury of the understanding: on the value of true belief, Oxford University Press, Oxford, 2013). (...) The burden of this paper is to explain these appearances away. I contend that the impression of epistemic partiality in friendship dissipates once we acknowledge the sorts of practical and epistemic reasons that are generated by our values: value-reflecting reasons. The present proposal has several virtues: it requires fewer substantial commitments than other proposals seeking to resist the case for epistemic partiality ; it is independently motivated, as it cites a phenomenon—value-reflecting reasons—we have independent reasons to accept; it provides a single, unified account of how various features of friendship bear on belief-formation; and makes clear how it is the very value we place on friendship itself that ensures against epistemic partiality. (shrink)

In this paper, I show that Turri’s (2015a) experimental study concerning selfless assertions is defective and should therefore be rejected. One performs a selfless assertion when one states something that one does not believe, and hence does not know, despite possessing well supported evidence to the contrary. Following his experimental study, Turri argues that agents in fact both believe and know the content of their selfless assertions. In response to this claim, I demonstrate that the conclusions he draws are premature (...) in this regard. More specifically, I criticize his methodology, showing that his study is not only incomplete but also yields contradictory results. In closing, I propose how such a study should be conducted in order to receive comprehensive results. (shrink)

Several influential characterizations of paternalism or its distinctive wrongness emphasize a belief or judgement that it typically involves—namely, 10 the judgement that the paternalized is likely to act irrationally, or some such. But it's not clear what about such a belief can be morally objectionable if it has the right epistemic credentials (if it is true, say, and is best supported by the evidence). In this paper, I elaborate on this point, placing it in the context of the relevant epistemological (...) discussions. I explain how 15 evidentialism is opposed to such thoughts; I show that possible ways of rejecting evidentialism (along lines analogous to those of pragmatic encroachment) won't work; and I sketch an account of the wrongness of paternalism that doesn't depend on any flaw in the belief about others' likely behaviour. (shrink)

In this paper, we present the results of two surveys that investigate subjects’ judgments about what can be known or justifiably believed about lottery outcomes on the basis of statistical evidence, testimonial evidence, and “mixed” evidence, while considering possible anchoring and priming effects. We discuss these results in light of seven distinct hypotheses that capture various claims made by philosophers about lay people’s lottery judgments. We conclude by summarizing the main findings, pointing to future research, and comparing our findings to (...) recent studies by Turri and Friedman. (shrink)

This paper advances two theses about evolutionary debunking arguments in ethics. The first is that, while such arguments are often motivated with the rhetoric of ‘luck', proponents of these arguments have not distinguished between the kinds of luck that might lead to the formation of a true belief. Once we make the needed distinctions, the relevance of the kind of luck which can be derived from broadly evolutionary explanations to the epistemological conclusions debunkers draw is suspect. The second thesis is (...) that debunkers might successfully show that epistemic luck is relevant to their concerns. But they will need to include specific premises about the kind of evolutionary mechanism that explains the beliefs that the debunker targets. Proponents of debunking arguments, if they continue to insist on using luck-based considerations, are then hostage to empirical fortune in a way not previously recognized. (shrink)

With 13 essays, the short chapter summary approach will not work for reviewing this book.1 1 The chapters are not broken down into sections, so I can’t select representatives from sections. With not a single bad essay among them, I get no help narrowing it down that way either. I shall, then, focus on the contributions of women and more junior contributors, setting aside the chapters of the editors and others with whom I have fairly close personal connections.

Relativism and contextualism have been suggested as candidate semantics for “knowledge” sentences. I argue that relativism faces a problem concerning the preservation of beliefs in memory. Contextualism has been argued to face a similar problem. I argue that contextualists, unlike relativists, can respond to the concern. The overall upshot is that contextualism is superior to relativism in at least one important respect.

A powerful objection to subject-sensitive invariantism concerns various ‘strange-but-true’ conditionals. One popular response to this objection is to argue that strange-but-true conditionals pose a problem for non-sceptical epistemological theories in general. In the present paper, it is argued that strange-but-true conditionals are not a problem for contextualism about ‘know’. This observation undercuts the proposed defence of SSI, and supplies a surprising new argument for contextualism.

A epistemologia do testemunho tem reacendido forte interesse entre a classe dos atuais epistemólogos. Tem sido redescoberta a sua indispensabilidade epistêmica e reassumida a posição de que o testemunho é uma fonte de crenças penetrante e natural, no qual muitas das crenças nele fundamentadas constituem conhecimento e estão justificadas. Reducionistas e antirreducionistas se alternam, repetidamente, para explicar o papel epistêmico do testemunho na justificação da crença testemunhal, gerando um acirrado debate na epistemologia contemporânea. Advogada do Reducionismo local, Elizabeth Fricker refuta (...) a relevância da justificação com base no testemunho para crença testemunhal. Com base nisso, este artigo propõe apresentar algumas críticas aos argumentos de refutação reducionista de Fricker quanto à possibilidade epistêmica do testemunho.: The epistemology of testimony has rekindled strong reigniting interest among the train of current epistemologists. Its epistemic indispensability has been unearthed anew and the importance that the testimony is a natural and pervasive source of beliefs has been recaptured as well, considering that many of the beliefs based on itself constitute knowledge and are justified. Reductionists and Anti-Reductionists alternate, repeatedly, explaining the epistemic role of testimony in justification of testimonial belief, generating a heated debate in contemporary epistemology. Reductionism local lawyer, Elizabeth Fricker, refutes the relevance of justification with testimony-based to testimonial belief. Based on that, this paper aims at presenting some criticism to the reductive refutation of Fricker’s arguments as to the epistemic possibility of testimony. Keywords : Epistemology of testimony. Testimonial justification. Local Reductionism. Anti-Reductionism. Inferential Support. (shrink)

In epistemology, fake-barn thought experiments are often taken to be intuitively clear cases in which a justified true belief does not qualify as knowledge. We report a study designed to determine whether non-philosophers share this intuition. The data suggest that while participants are less inclined to attribute knowledge in fake-barn cases than in unproblematic cases of knowledge, they nonetheless do attribute knowledge to protagonists in fake-barn cases. Moreover, the intuition that fake-barn cases do count as knowledge is negatively correlated with (...) age; older participants are less likely than younger participants to attribute knowledge in fake-barn cases. We also found that increasing the number of defeaters (fakes) does not decrease the inclination to attribute knowledge. (shrink)

This paper has two main parts. In the first part, I argue that prominent moves in two related current debates in epistemology—viz., the debates over classical invariantism and the knowledge first movement—depend on one or the other of two claims about epistemic propriety: (1) Impropriety due to lack of a particular epistemic feature suffices for epistemic impropriety; and (2) Having justification to believe P suffices for having warrant to assert P. In the second part, I present and defend novel arguments (...) against both claims. (shrink)

Luck looms large in numerous different philosophical subfields. Unfortunately, work focused exclusively on the nature of luck is in short supply on the contemporary analytic scene. In his highly impressive recent book Epistemic Luck, Duncan Pritchard helps rectify this neglect by presenting a partial account of luck that he uses to illuminate various ways luck can figure in cognition. In this paper, I critically evaluate both Pritchard’s account of luck and another account to which Pritchard’s discussion draws our attention—viz., that (...) due to Nicholas Rescher. I also assess some novel analyses of luck that incorporate plausible elements of Pritchard’s and Rescher’s accounts. (shrink)

Gettiered beliefs are those whose agents are subject to the kind of epistemologically significant luck illustrated by Gettier Cases. Provided that knowledge requires ungettiered belief, we can learn something about knowledge by figuring out how luck blocks it in Gettier Cases. After criticizing the most promising of the going approaches to gettiered belief—the Risk of False Belief Approach—, I explain and defend a new approach: the Risk of Misleading Dispositions Approach.Roughly, this view says that a belief is gettiered just in (...) case its unfortunate subject has at best just luckily avoided being disposed by his belief’s actual grounds to believe a wide class of falsehoods about his environment. I then show how this approach undercuts an influential recent argument that knowledge has no more value than certain subsets of its components. (shrink)

(No abstract is available for this citation).

In a recent article, Douven and Williamson offer both (i) a rebuttal of various recent suggested sufficient conditions for rational acceptability and (ii) an alleged ‘generalization’ of this rebuttal, which, they claim, tells against a much broader class of potential suggestions. However, not only is the result mentioned in (ii) not a generalization of the findings referred to in (i), but in contrast to the latter, it fails to have the probative force advertised. Their paper does however, if unwittingly, bring (...) us a step closer to a precise characterization of an important class of rationally unacceptable propositions—the class of lottery propositions for equiprobable lotteries. This helps pave the way to the construction of a genuinely lottery-paradox-proof alternative to the suggestions criticized in (i). (shrink)

The arguments for and against a truth-relativist semantics for propositional knowledge attributions (KTR) have been debated almost exclusively in the philosophy of language. But what implications would this semantic thesis have in epistemology? This question has been largely unexplored. The aim of this paper is to establish and critique several ramifications of KTR in mainstream epistemology. The first section of the paper develops, over a series of arguments, the claim that MacFarlane's (2005, 2010) core argument for KTR ultimately motivates (for (...) better or worse) the extension of a truth-relativist semantics to a subset of understanding attributions – attributions of understanding-why. I conclude by presenting some reasons to think that even if KTR were otherwise plausible, a truth-relativist semantics for understanding-why attributions is not. These claims, taken together, constitute a kind of epistemological argument against MacFarlane-style truth-relativism for knowledge attributions. (shrink)

In this paper we present two distinctly epistemological puzzles that arise for one who aspires to defend some plausible version of the precautionary principle. The first puzzle involves an application of contextualism in epistemology; and the second puzzle concerns the task of defending a plausible version of the precautionary principle that would not be invalidated by de minimis.

An account of meta-epistemic defeaters—distinct from traditional epistemic defeaters—is motivated and defended, drawing from case studies involving epistemic error-theory and epistemic relativism. Mechanisms of traditional epistemic defeat and meta-epistemic defeat are compared and contrasted, and some new puzzles are introduced.