This paper draws a line of demarcation between fallibilism and infallibilism. Taking Cartesian Infallibilism as a guide, it advances a picture of infallibilism whereby infallible knowledge requires, among other conditions, luminosity of a truth-guaranteeing property. Some implications for contemporary theories of knowledge are explored.

I advance a novel argument for an infallibilist theory of knowledge, according to which we know all and only those propositions that are certain for us. I argue that this theory lets us reconcile major extant theories of knowledge, in the following sense: for any of these theories, if we require that its central condition (evidential support, reliability, safety, etc.) obtains to a maximal degree, we get a theory of knowledge extensionally equivalent to infallibilism. As such, the infallibilist can affirm (...) that, when their conditions are suitably interpreted, most post-Gettier theories of knowledge offer necessary and sufficient conditions for knowledge. The infallibilist can thus reconcile major theories of knowledge, and is in a better position to explain the intuitive appeal of these theories than the fallibilist who only accepts one of them, and rejects the rest. (shrink)

Epistemic absolutism holds that knowledge‐that is ungradable, while epistemic gradualism argues the opposite. This paper purports to remodel the gradualism/absolutism debate. The current model initiated by Stephen Hetherington fails to capture the genuine divergence between the two views, which makes the debate equivocal, and the gradualist side lacks appeal. I propose that the remodeled debate should focus on whether knowledge‐that is a ‘threshold concept’ or a ‘spectrum concept’. That is, whether there is a threshold distinguishing knowledge from non‐knowledge. The reconstructed (...) model enjoys significant advantages as it enables the debate to be more balanced and philosophically interesting. (shrink)

Carter (Noûs 55(1):171–198, 2021) argued that while most simple positive numerical sentences are literally false, they can communicate true contents because relevance has a weakening effect on their literal contents. This paper presents a challenge for his account by considering entailments between the imprecise contents of numerical sentences and the imprecise contents of comparatives. I argue that while Carter's weakening mechanism can generate the imprecise contents of plain comparatives such as `A is taller than B', it cannot generate the imprecise (...) contents of comparatives that quantify the difference between their arguments, such as `A is exactly n times as tall as B'. I then propose an alternative theory on which intervals serve as both thick degrees on a scale and denotations of numerical expressions. I argue that the alternative theory can account for the imprecise contents of both forms of comparatives as well as the data that motivate Carter's theory. (shrink)

Assertions have a curious relationship to certainty. On the one hand, it seems clear that we can assert many everyday propositions while not being absolutely certain about them. On the other hand, it seems odd to say things like ‘p, but I am not absolutely certain that p’. In this paper, I aim to solve this conundrum. I suggest a pretense theory of assertion, according to which assertions of p are proposals to act as if the conversational participants were absolutely (...) certain of p. I suggest that this explains why absolute certainty is not required to make assertions, while it is still problematic to voice your uncertainties once you have made an assertion. By voicing your uncertainties, you thwart your very own proposal to act as if everybody was absolutely certain. (shrink)

Knowledge is factually grounded belief. This account uses the same ingredients as the traditional analysis—belief, truth, and justification—but posits a different relation between them. While the traditional analysis begins with true belief and improves it by simply adding justification, this account begins with belief, improves it by grounding it, and then improves it further by grounding it in the facts. In other words, for a belief to be knowledge, it's not enough that it be true and justified; for a belief (...) to be knowledge, it must be justified by the facts. This account solves the Gettier problem. Gettierized beliefs fall short of knowledge because, albeit true and justified, they are not grounded in the facts. This account also elucidates why knowledge attributions are sensitive to epistemic standards. It's because whether we take a belief to be grounded in the facts is sensitive to epistemic standards. (shrink)

According to Probability 1 Infallibilism (henceforth, Infallibilism), if one knows that p, then the probability of p given one’s evidence is 1. Jessica Brown (2018, 2013) has recently argued that Infallibilism leads to scepticism unless the infallibilist also endorses the claim that if one knows that p, then p is part of one’s evidence for p. By doing that, however, the infalliblist has to explain why it is infelicitous to cite p as evidence for itself. And yet, the infallibilist doesn’t (...) seem to have a satisfying explanation available. Call this the Infelicity Challenge for Probability 1 Infallibilism. By exploiting the distinction between the justifying and the motivating role of evidence, in this paper, I argue that, contrary to first appearances, the Infelicity Challenge doesn’t arise for Probability 1 Infallibilism. However, after anticipating and resisting two objections to my argument, I show that we can identify a different version of infallibilism which seems to face a problem that is even more serious than the Infelicity Challenge. (shrink)

I present a cumulative case for the thesis that we only know propositions that are certain for us. I argue that this thesis can easily explain the truth of eight plausible claims about knowledge: -/- (1) There is a qualitative difference between knowledge and non-knowledge. (2) Knowledge is valuable in a way that non-knowledge is not. (3) Subjects in Gettier cases do not have knowledge. (4) If S knows that P, P is part of S’s evidence. (5) If S knows (...) that P, ~P is epistemically impossible for S. (6) If S knows that P, S can rationally act as if P. (7) If S knows that P, S can rationally stop inquiring whether P. (8) If S knows each of {P1, P2, … Pn}, and competently deduces Q from these propositions, S knows that Q. -/- I then argue that the skeptical costs of this thesis are outweighed by its explanatory power. (shrink)

Skeptical invariantism does not account for the intuitive connections between knowledge, assertion, and practical reasoning and this constitutes a significant problem for the position because it does not save corresponding epistemic appearances (cf. Hawthorne (2004:131-5)). Moreover, it is an attraction of fallibilist over infallibilist-skeptical views that they can easily account for the epistemic appearances about the connections between knowledge, assertion, and practical reasoning (cf. Williamson (2000:249-255)). Call this argument ‘the argument from the knowledge norm’. I motivate and develop a Humean, (...) pragmatist strategy for a skeptical response to ‘the argument from the knowledge norm’. Afterwards I outline a ‘toy’ version of pragmatic skepticism that can implement the strategy and save our everyday practice of assertion and practical reasoning. To this effect, I distinguish between assertibility conditions and truth conditions for ‘know’ and suggest that while assertibility conditions are pragmatic conditions sensitive to practical exigencies, truth conditions are semantic conditions sensitive only to truth. I briefly respond to three objections and conclude that pragmatic skepticism is resourceful enough to save our everyday practice of (fallibilist) assertion and practical reasoning and, hence, pay some due respect to corresponding epistemic appearances. (shrink)

Infallibilism is commonly rejected because it is apparently subject to easy counter-examples. I describe a strategy that infallibilists can use to resist this objection. Because the sentences used in the counter-examples to express evidence and belief are context-sensitive, the infallibilist can insist that such counter-examples trade on a vacillation between different readings of these sentences. I describe what difficulties await those who try to produce counter-examples against which the proposed strategy is ineffective.

Do you know you are not being massively deceived by an evil demon? That is a familiar skeptical challenge. Less familiar is this question: How do you have a conception of knowledge on which the evil demon constitutes a prima facie challenge? Recently several philosophers have suggested that our responses to skeptical scenarios can be explained in terms of heuristics and biases. We offer an alternative explanation, based in learning theory. We argue that, given the evidence available to the learner, (...) it would be rational for the learner to infer an infallibilist conception of knowledge. (shrink)

I argue that believing that p implies having a credence of 1 in p. This is true because the belief that p involves representing p as being the case, representing p as being the case involves not allowing for the possibility of not-p, while having a credence that’s greater than 0 in not-p involves regarding not-p as a possibility.

The relation of scepticism to infallibilism and fallibilism is a contested issue. In this paper I argue that Cartesian sceptical arguments, i.e. sceptical arguments resting on sceptical scenarios, are neither tied to infallibilism nor collapse into fallibilism. I interpret the distinction between scepticism and fallibilism as a scope distinction. According to fallibilism, each belief could be false, but according to scepticism all beliefs could be false at the same time. However, to put this distinction to work sceptical scenarios have to (...) be understood as ignorance-possibilities, not as error-possibilities. To show that scepticism is not tied to infallibilism I reject the principle of unrestricted relevance according to which any error- or ignorance-possibility whatsoever is relevant. Instead I argue that the sceptic should distinguish between local and global ignorance-possibilities. Global ignorance-possibilities are relevant even though not all ignorance-possibilities are relevant. The result is a refined version of the Cartesian sceptical argument that avoids two traps other versions do not avoid. (shrink)

Although recent epistemology has been marked by several prominent disagreements – e.g., between foundationalists and coherentists, internalists and externalists – there has been widespread agreement that some form of fallibilism must be correct. According to a rough formulation of this view, it is possible for a subject to have knowledge even in cases where the justification or grounding for the knowledge is compatible with the subject’s being mistaken. In this paper, I examine the motivation for fallibilism before providing a fully (...) general account of the view. I conclude by looking at the two major difficulties for fallibilism: the Gettier problem and the lottery paradox. (shrink)

I review proposed skepticisms in recent literature (or skeptical invariantisms, if we understand skepticism semantically), contrast their basic commitments and highlight some of their comparative theoretical attractions and problems. To help set the scene for the discussion, I start with Unger’s (1975) modern classic of global skepticism about knowledge (and justification). I then distinguish three extant categories of skepticism in the recent literature: two non‐traditional and one more traditional. On the non‐traditional side are fallibilist science‐based skepticism (which relaxes thestringencyof the (...) standard of knowledge) and practical skepticism (which questions theintellectualcharacter of the standard of knowledge) and on the traditional side high‐standard/infallibilist. I then briefly present and discuss representatives of each category. (shrink)

O presente volume se trata de uma coletânea de artigos que reúne alguns dos trabalhos propostos para o evento “III International Colloquium of Analytic Epistemology and VII Conference of Social Epistemology”, realizado entre os dias 27 e 30 de Novembro de 2018, na Universidade Federal de Santa Maria. O “III International Colloquium of Analytic Epistemology and VII Conference of Social Epistemology” é um dos principais eventos de Epistemologia analítica da América Latina e reúne especialistas do Brasil e do exterior para (...) promover debates de alto nível sobre temas que fazem parte da agenda contemporânea no que se refere ao debate analítico contemporâneo acerca da Epistemologia. (shrink)

What is it to believe something might be the case? We develop a puzzle that creates difficulties for standard answers to this question. We go on to propose our own solution, which integrates a Bayesian approach to belief with a dynamic semantics for epistemic modals. After showing how our account solves the puzzle, we explore a surprising consequence: virtually all of our beliefs about what might be the case provide counterexamples to the view that rational belief is closed under logical (...) implication. (shrink)

When spelled out properly infallibilism is a viable and even attractive view. Because it has long been summary dismissed, however, we need a guide on how to properly spell it out. The guide has to fulfil four tasks. The first two concern the nature of knowledge: to argue that infallible belief is necessary, and that it is sufficient, for knowledge. The other two concern the norm of belief: to argue that knowledge is necessary, and that it is sufficient, for justified (...) certainty. With such a guide in hand infallibilism can be evaluated on its own merits. The most controversial parts are the first and fourth. The idea that knowledge requires infallible belief is thought to be excessively sceptical. The idea that knowledge warrants certainty is thought to be excessively dogmatic. The present paper addresses the first. It argues that knowledge requires infallible belief. (shrink)

We’ve all been at parties where there's one cookie left on what was once a plate full of cookies, a cookie no one will eat simply because everyone is following a rule of etiquette, according to which you’re not supposed to eat the last cookie. Or at least we think everyone is following this rule, but maybe not. In this paper I present a new paradox, the Cookie Paradox, which is an argument that seems to prove that in any situation (...) in which everyone is truly following the rule, no one eats any cookies at all, no matter how many there are to be eaten. The ‘Cookie Argument’ resembles the more familiar argument that surprise exams are impossible, but it's not exactly the same. I argue that the biggest difference is that, unlike the surprise exam argument, the Cookie Argument is actually sound! I conclude the paper by explaining how it could be possible for a group of people to engage in behavior (eating cookies) that guarantees that at least one of the members of the group will violate a rule, even when it's common knowledge in the group that everyone is committed to following that very rule. (shrink)

Our beliefs utilize various sources: perception, memory, induction, etc. We trust these sources to provide reliable information about the world around us. My dissertation investigates how this trust could be justified. Chapter one introduces background material. I argue that justification rather than knowledge is of primary epistemological importance, discuss the internalism/externalism debate, and introduce an evidentialist thesis that provides a starting point/framework for epistemological theorizing. Chapter two introduces a puzzle concerning justification. Can a belief source provide justification absent prior justification (...) for believing it's reliable? Any answer appears to either make justifying the reliability of a source intellectually unsatisfying or all together impossible. Chapter three considers and rejects a plethora of proposed solutions to our puzzle. Investigating these solutions illustrates the need to further investigate evidence, evidence possession, and evidential support. Chapter four discusses the metaphysics of evidence. I argue that evidence always consists of a set of facts and that fact-proposition pairs stand in confirmation relations isomorphic to those holding between pairs of propositions. Chapter five argues that justification requires what I call actually connected possession of supporting evidence: a subject must be aware of supporting evidence and of the support relation itself. Chapter six argues that the relation constitutive of a set of facts being justificatory evidence is a sui generis and irreducible relation that is knowable a priori. Chapter seven begins by showing how Richard Fumerton's acquaintance theory meets the constraints on a theory of justification laid down in previous chapters. I modify the theory so as to: make room for fallible foundational justification, and allow inferential justification absent higher-order beliefs about evidential connections. Chapter eight applies the developed theory of justification to our initial puzzle. I show how my modified acquaintance theory is in a unique position to vindicate the idea that necessarily a source provides a person with justification only if she is aware of evidence for the reliability of that source. However, this awareness of evidence for a source's reliability falls short of a justified belief and thereby avoids impalement from our dilemma's skeptical horn. (shrink)

I develop one partial explanation of the origins of our fallibilist intuitions about knowledge in ordinary language fallibilism and argue that this explanation indicates that our epistemic methodology should be more impartial and theory-neutral. First, I explain why the so-called Moorean constraint (cf. Hawthorne 2005, 111) that encapsulates fallibilist intuitions is fallibilism’s cornerstone. Second, I describe a pattern of fallibilist reasoning in light of the influential dual processing and heuristics and biases approach to cognition (cf. Kahneman 2011; Thaler and Sunstein (...) 2008; Evans 2017). I suggest that this pattern of reasoning involves the question-substitution heuristic, the availability and representativeness heuristics, the focusing bias as well as framing effects, priming and the anchoring and adjusting heuristic. Third, I argue that this fallibilist pattern of reasoning is methodologically dubious because it involves a vicious circularity and briefly outline an alternative, more impartial and theory-neutral abductive methodology for the theory of knowledge. Finally, I briefly explain how this analysis sheds light on the ordinary language fallibilism of Moore (1939), Austin (1961), Wittgenstein (1969) and Chisholm (1982). (shrink)

Several philosophers have claimed that S knows p only if S’ s belief is safe, where S's belief is safe iff (roughly) in nearby possible worlds in which S believes p, p is true. One widely held intuition many people have is that one cannot know that one's lottery ticket will lose a fair lottery prior to an announcement of the winner, regardless of how probable it is that it will lose. Duncan Pritchard has claimed that a chief advantage of (...) safety theory is that it can explain the lottery intuition without succumbing to skepticism. I argue that Pritchard is wrong. If a version of safety theory can explain the lottery intuition, it will also lead to skepticism. Content Type Journal Article Category Original Article Pages 1-26 DOI 10.1007/s10670-011-9305-z Authors Dylan Dodd, Department of Philosophy, Northern Institute of Philosophy, University of Aberdeen, Aberdeen, UK Journal Erkenntnis Online ISSN 1572-8420 Print ISSN 0165-0106. (shrink)

This paper comprises a defence of Infallibilism about knowledge. In it, I articulate two arguments in favour of Infallibilism, and for each argument show that Infallibilism about knowledge does not lead to an unpalatable Scepticism if justified belief is neither necessary nor sufficient for knowledge, and if Fallibilism about justified belief is true.

In “How to Be an Infallibilist,” Julien Dutant (2016, 149) presents a simple and seemingly plausible argument that knowledge requires infallible belief—roughly, belief that could not be mistaken. As Dutant recognizes, infallibilism is almost universally dismissed, in large part because it seems to rule out any knowledge of the physical world. He seeks to show how we can be an Infallibilist without being a skeptic, based on the assumption that knowledge has a safety condition. I critically examine each line of (...) Dutant’s argument, showing that the argument is unsound on any plausible interpretation. I also question the idea that knowledge cannot be the conjunction of true belief and a nonfactive condition, that any belief about the physical world could not be false, and that any nonskeptical alternative to infallibilism would have to allow knowledge of chancy outcomes. I briefly suggest that a fallibilist account can be strict enough to satisfy the Infallibilist’s quest for certainty. (shrink)

While many authors distinguish belief from acceptance, it seems almost universally agreed that no similar distinction can be drawn between degrees of belief, or credences, and degrees of acceptance. I challenge this assumption in this paper. Acceptance comes in degrees and acknowledging this helps to resolve problems in at least two philosophical domains. Degrees of acceptance play vital roles when we simplify our reasoning, and they ground the common ground of a conversation if we assume context probabilism, i.e., that the (...) common ground must be represented with probability spaces rather than possible worlds. (shrink)

According to epistemic fallibilism, we cannot be certain of anything. According to the Christian tradition, faith comes with certainty. I develop this dilemma from recent accounts of fallibilism and various representatives of the Christian tradition. I then argue that on John Henry Newman's account of faith the dilemma is merely apparent. Finally, I develop Newman's account of the certainty that accompanies faith and is compatible with fallibilism.

In this paper I introduce a problem regarding whether there are good reasons to accept fallibilism about justified belief. According to this species of fallibilism, one can be justified in believing a proposition on the basis of reasons that do not justify certainty. Call such reasons “fallible reasons.” The problem is this: can one justifiably believe fallibilism on the basis of fallible reasons? To do so would seem to beg the question. If you are undecided as to whether you should (...) accept anything on the basis of fallible reasons, then you should also be undecided as to whether you should accept fallibilism on the basis of such reasons. In this paper I consider several possible responses to this problem. I argue that the most appealing is to grant that good but fallible reasons on behalf of fallibilism are possible, and that this shows that one’s basic rational commitments cannot be defended in a non-circular fashion. (shrink)

Stephen Hetherington has defended the tripartite analysis of knowledge (Hetherington in Philos Q 48:453–469, 1998; J Philos 96:565–587, 1999; J Philos Res 26:307–324, 2001a; Good knowledge, bad knowledge, Oxford University Press, Oxford, 2001b). His defence has recently come under attack (Madison in Australas J Philos 89(1):47–58, 2011; Turri in Synthese 183(3):247–259, 2012). I critically evaluate those attacks as well as Hetherington’s newest formulation of his defence (Hetherington in Philosophia 40(3):539–547, 2012b; How to know: A practicalist conception of knowledge, Wiley, Oxford, (...) 2011a; Ratio 24:176–191, 2011b; Synthese 188:217–230, 2012a). I argue that his newest formulation is vulnerable to a modified version of Madison’s and Turri’s objection. However, I argue that Hetherington’s considerations lend support to a different, though also radical, thesis which can meet the objection. This thesis is what I call the Divorce thesis: the theory of epistemic justification is importantly independent of the theory of knowledge. (shrink)

According to Eric Olson, the Thinking Animal Argument (TAA) is the best reason to accept animalism, the view that we are identical to animals. A novel criticism has been advanced against TAA, suggesting that it implicitly employs a dubious epistemological principle. I will argue that other epistemological principles can do the trick of saving the TAA, principles that appeal to recent issues regarding disagreement with peers and experts. I conclude with some remarks about the consequence of accepting these modified principles, (...) drawing out some general morals in defending animalism. (shrink)

AbstarctIn the first installment of Varieties of Skeptical Invariantism, we set the scene for subsequent discussion with Unger's (1975) modern classic of global skepticism and distinguished three varieties of skeptical invariantism in recent literature: traditional skeptical invariantism, fallibilist science-based skepticism and practical skepticism. We then presented fallibilist science-based skepticism, that is, the position that relaxes the stringency of the standard of knowledge but still questions parts of our everyday knowledge on the basis of scientific reasons. In particular, we presented Frances’ (...) (2005) ‘live’ skepticism and Hannon's (forthcoming) ‘hard-hitting’ skepticism. In this second installment, we present the two other varieties of skeptical invariantism we identified: traditional skepticism (high-standard and infallibilist) that respects all three commitments (intellectualism, invariantism, stringency) and practical skepticism that questions the intellectualist commitment. (shrink)

Dylan Dodd offers a simple, yet forceful, argument for infallibilism. The argument relies upon two assumptions concerning the relationship between knowledge, epistemic possibility, and epistemic probability. We argue below that by endorsing a particular conception of epistemic possibility, a fallibilist can both plausibly reject one of Dodd’s assumptions and mirror the infallibilist’s explanation of the linguistic data. In fact, such a fallibilist may even be able to offer a more comprehensive explanation than the infallibilist. Our discussion is of interest due (...) in part to the fact that many fallibilists have rejected the conception of epistemic possibility employed in our response to Dodd. (shrink)