Perceptual Justification

How can experience provide knowledge, or even justified belief, about the objective world outside our minds? This volume presents original essays by prominent contemporary epistemologists, who show how philosophical progress on foundational issues can improve our understanding of, and suggest a solution to, this famous sceptical question.

My contribution to the first round of a tetralog with Bill Brewer, Anil Gupta, and John McDowell. Each of us has written a response to the writings of the other three philosophers on the topic "Empirical Reason". My initial contribution focuses on what we know a priori about perception. In the second round, we will each respond to the each writer's first-round contributions.

Draft of a chapter on perception and bias including implicit bias.

This is a careful explication of and commentary on Wilfrid Sellars's classic essay "Empiricism and the Philosophy of Mind" [EPM]. It is appropriate for upper-level undergraduates and beyond. The full text of EPM is included in the volume.

Wittgenstein (W) is for me easily the most brilliant thinker on human behavior and this is his last work and crowning achievement. It belongs to his third and final period, yet it is not only his most basic work (since it shows that all behavior is an extension of innate true-only axioms and that our conscious ratiocination is but icing on unconscious machinations), but as Daniele Moyal-Sharrock has recently noted, is a radical new epistemology and the foundation for all description (...) of animal behavior, revealing how the mind works and indeed must work. The "must" is entailed by the fact that all brains share a common ancestry and common genes, and so there is only one basic way they work, that this necessarily has an axiomatic structure, that all higher animals share the same evolved psychology based on inclusive fitness, and in humans this is extended into a personality based on throat muscle contractions (language) that evolved to manipulate others (with variations that can be regarded as trivial). This book, and arguably all of W's work and all useful discussion of behavior is a development of or variation on these ideas. -/- 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)

Pears is an eminent philosopher, notable among W scholars for his “The False Prison: a study of the development of Wittgenstein’s philosophy” in 2 volumes published 20 years ago. Based on these facts I expected some deep insights into W in the current volume. There were certainly some good points but overall it was profoundly disappointing. All of behavioral science is about our innate human nature and since W was the first to elucidate the axioms of our universal psychology, I (...) expected this to be front and center in a work written during the golden age of evolutionary and cognitive psychology and with much good recent work on W appearing. However, one would never guess from this book that W or philosophy had any connection with psychology or indeed that there is such a thing as evolutionary psychology. Hence, I cannot recommend Pears works and instead provide a framework for rationality totally lacking in Pears (and most writing on human behavior). -/- 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)

Horwich gives a fine analysis of Wittgenstein (W) and is a leading W scholar, but in my view, they all fall short of a full appreciation, as I explain at length in this review and many others. If one does not understand W (and preferably Searle also) then I don't see how one could have more than a superficial understanding of philosophy and of higher order thought and thus of all complex behavior (psychology, sociology, anthropology, history, literature, society). In a (...) nutshell, W demonstrated that when you have shown how a sentence is used in the context of interest, there is nothing more to say. I will start with a few notable quotes and then give what I think are the minimum considerations necessary to understand Wittgenstein, philosophy and human behavior. -/- First one might note that putting “meta” in front of any word should be suspect. W remarked e.g., that metamathematics is mathematics like any other. The notion that we can step outside philosophy (i.e., the descriptive psychology of higher order thought) is itself a profound confusion. Another irritation here (and throughout academic writing for the last 4 decades) is the constant reverse linguistic sexism of “her” and “hers” and “she” or “he/she” etc., where “they” and “theirs” and “them” would do nicely. Likewise, the use of the French word 'repertoire' where the English 'repertory' will do quite well. The major deficiency is the complete failure (though very common) to employ what I see as the hugely powerful and intuitive two systems view of HOT and Searle’s framework which I have outlined above. This is especially poignant in the chapter on meaning p111 et seq. (especially in footnotes 2-7), where we swim in very muddy water without the framework of automated true only S1, propositional dispositional S2, COS etc. One can also get a better view of the inner and the outer by reading e.g., Johnston or Budd (see my reviews). Horwich however makes many incisive comments. I especially liked his summary of the import of W’s anti-theoretical stance on p65. He needs to give more emphasis to ‘On Certainty’, recently the subject of much effort by Daniele Moyal- Sharrock, Coliva and others and summarized in my recent articles. -/- Horwich is first rate and his work well worth the effort. One hopes that he (and everyone) will study Searle and some modern psychology as well as Hutto, Read, Hutchinson, Stern, Moyal-Sharrock, Stroll, Hacker and Baker etc. to attain a broad modern view of behavior. Most of their papers are on academia dot edu and philpapers dot org , but for PMS Hacker see his papers on his Oxford page. -/- He gives one of the most beautiful summaries of where an understanding of Wittgenstein leaves us that I have ever seen. -/- “There must be no attempt to explain our linguistic/conceptual activity (PI 126) as in Frege’s reduction of arithmetic to logic; no attempt to give it epistemological foundations (PI 124) as in meaning based accounts of a priori knowledge; no attempt to characterize idealized forms of it (PI 130) as in sense logics; no attempt to reform it (PI 124, 132) as in Mackie’s error theory or Dummett’s intuitionism; no attempt to streamline it (PI 133) as in Quine’s account of existence; no attempt to make it more consistent (PI 132) as in Tarski’s response to the liar paradoxes; and no attempt to make it more complete (PI 133) as in the settling of questions of personal identity for bizarre hypothetical ‘teleportation’ scenarios.” -/- Finally, let me suggest that with the perspective I have encouraged here, W is at the center of contemporary philosophy and psychology and is not obscure, difficult or irrelevant, but scintillating, profound and crystal clear and that to miss him is to miss one of the greatest intellectual adventures possible. -/- 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)

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 aim of the 17 original papers here is to summarize and analyze Wittgenstein's thought. At the time these were being written, the Oxford/Intelex CDROM ($2040 on Amazon but available thru interlibrary loan and steeply discounted on the net) with 20,000 some pages of W's nachlass, as well as the various online versions of the nachlass, were not yet available, and only those fluent in German and willing to find and slog thru the incomplete Cornell microfilm were able to examine (...) it. To this day, much of it remains untranslated from the German typescripts and handwritten manuscripts. I note this at the outset as W's untranslated or unpublished writings often shed crucial light on his thought and few to this day have made substantial use of them. In addition, there are huge problems with translation of his early 20th century Viennese German into modern English. One must be a master of English, German, and Wittgenstein in order to do this and very few are up to it. Several of the current authors note unfortunate translation errors in the only available English editions and I have seen similar comments countless times. -/- As is well known, W's thought changed dramatically between the publication of the Tractatus (TLP) in 1922 and the Philosophical Investigations (1953). The continuity or lack thereof between his early and late work is the subject of a vast literature and is taken up here by several authors. Ishiguro on the picture theory and Mounce on the logical system in TLP are good, but for me the endless discussions of exactly how he was mistaken in his early work is of as little interest as the mistakes in most previous philosophy. Ammereller on Intentionality is a good, if prosaic, summary of (mostly) the early and middle W on belief and interpretation which, like virtually everyone, totally fails to give an adequate overview of W's pioneering work. In giving the general outline of our innate evolutionary psychology (i.e., roughly our personality) and showing how this describes behavior, W represents a major milestone in human thought. There are unmistakeable indications of this even in his early writings (e.g., see p 40, 49-58 here) and it has been documented by Hacker (e.g., see his paper in The New Wittgenstein) and others but without any comprehensive account in book form to date (but see the many recent writings of Daniele Moyal-Sharrock, Coliva etc.). Overall a good book for introducing W to a general philosophical audience but now very dated by the recent work of Hacker, Daniele Moyal-Sharrock, Coliva, Hutto, Read and others. -/- 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)

Abstract: On one formulation, epistemological disjunctivism is the view that our perceptual beliefs constitute knowledge when they are based on reasons that provide them with factive support. Some would argue that it is impossible to understand how perceptual knowledge is possible unless we assume that we have such reasons to support our perceptual beliefs. Some would argue that it is impossible to understand how perceptual experience could furnish us with these reasons unless we assume that the traditional view of experience (...) is mistaken. For reasons explained here, I think that the epistemological argument for metaphysical disjunctivism rests on mistaken assumptions about reasons and their rational role. Neither disjunctivist view is needed to understand how perceptual knowledge is possible. (shrink)

Russell’s theory of acquaintance construes perceptual awareness as at once constitutively independent of conceptual thought and yet a source of propositional knowledge. Wilfrid Sellars, John McDowell, and other conceptualists object that this is a ‘myth’: perception can be a source of knowledge only if conceptual capacities are already in play therein. Proponents of a relational view of experience, including John Campbell, meanwhile voice sympathy for Russell’s position on this point. This paper seeks to spell out, and defend, a claim that (...) offers the prospects for an attractive, unacknowledged element of common ground in this debate. The claim is that conceptual capacities, at least in a certain minimal sense implicit in McDowell’s recent work, must be operative in perceptual experience, if it is to rationalize judgement. The claim will be supported on the basis of two premises, each of which can be defended drawing, inter alia, on considerations stressed by Campbell. First, that experience rationalizes judgement only if it is attentive. Second, that attention qualifies as a conceptual capacity, in the noted, minimal sense. The conjunction of the two premises might be dubbed ‘attentional conceptualism’. (shrink)

This handout contains my replies to comments on the Rationality of Perception by Jennifer Nagel, Adam Pautz, and Peter Railton from a symposium at the 2018 Eastern APA in Savannah.

This paper surveys selected (though arguably representative) versions of metaphysical and epistemological disjunctivism. Although they share a common logical structure, it is hard to find a further common denominator among them. Two main conclusions are: (1) a specific standpoint on the nature of perceptual relation is not such a common denominator, which means that it is very unlikely that all of these views could be refuted with a single objection; (2) contrary to what its name suggests, disjunctivism can be correctly (...) expressed without the employment of disjunction. (shrink)

Experiences justify beliefs about our environment. Sometimes the justification is immediate: seeing a red light immediately justifies believing there is a red light. Other times the justification is mediate: seeing a red light justifies believing one should brake in a way that is mediated by background knowledge of traffic signals. How does this distinction map onto the distinction between what is and what isn't part of the content of experience? Epistemic egalitarians think that experiences immediately justify whatever is part of (...) their content. Epistemic elitists deny this and think that there is some further constraint the contents of experience must satisfy to be immediately justified. Here I defend epistemic elitism, propose a phenomenological account of what the further constraint is, and explore the resulting view's consequences for our knowledge of other minds, and in particular for perceptual theories of this knowledge. (shrink)

Dogmatists claim that having a perceptual experience as of p can provide one with immediate and defeasible warrant to believe that p. A persistent complaint against this position is that it sanctions an intuitively illicit form of reasoning: bootstrapping. I argue that dogmatism has no such commitments. Dogmatism is compatible with a principle that disallows the final non-deductive inference in the bootstrapping procedure. However, some authors have maintained that such strategy is doomed to failure because earlier stages of in the (...) bootstrapping inference are already problematic. I argue that insofar as these inferences appear problematic, the dogmatist is not committed to sanctioning them. I conclude that the bootstrapping argument presents no significant objection to the claim that perceptual experiences can provide immediate and defeasible warrant to believe their contents. (shrink)

Radical empiricism is the view that experience is the only source of knowledge. Hence, radical empiricism denies the existence of a priori knowledge. Its most famous proponents are John Stuart Mill and W. V. Quine. Although both reject a priori knowledge, they offer different empiricist accounts of the knowledge alleged by their opponents to be a priori. My primary concern in this paper is not with the cogency of their positive accounts. My focus is their arguments against a priori knowledge. (...) My goal is to establish that although they offer very different arguments against the existence of a priori knowledge, each of their arguments suffers from a common defect. They both fail to appreciate the phenomenon of epistemic overdetermination and its role in the theory of knowledge. (shrink)

Reidentification scepticism is the view that we cannot knowledgeably reidentify previously perceived objects. Amongst classical Indian philosophers, the Buddhists argued for reidentification scepticism. In this essay, I will discuss two responses to this Buddhist argument. The first response, defended by Vācaspati Miśra (9th century CE), is that our outer senses allow us to knowledgeably reidentify objects. I will claim that this proposal is problematic. The second response, due to Jayanta Bhaṭṭa (9th century CE), is that the manas or the inner (...) sense, functioning as a capacity of attention, helps us knowledgeably reidentify objects. I will explain how this second response answers the Buddhists’ challenge. (shrink)

There are three well-known models of how to account for perceptual belief within a probabilistic framework: (a) a Cartesian model; (b) a model advocated by Timothy Williamson; and (c) a model advocated by Richard Jeffrey. Each of these models faces a problem—in effect, the problem of accounting for the defeasibility of perceptual justification and perceptual knowledge. It is argued here that the best way of responding to this the best way of responding to this problem effectively vindicates the Cartesian model. (...) Finally, it is argued that, given the best interpretation of the probabilistic framework, that the Cartesian model is not vulnerable to the main criticisms that have been raised against it. (shrink)

In her book The Rationality of Perception, Susanna Siegel argues for the interesting idea that perceptual experiences are in an important epistemic sense much more like beliefs than has previously been supposed. Like beliefs, perceptual experiences themselves already manifest a certain epistemic status, and, like beliefs, the way in which those experiences are formed will impact what that epistemic status will be. In what follows, I will first contrast this view of the rationality of perception with the usual way of (...) thinking about perception and justification and explain some of its crucial motivations (§1). I will then go on to critically discuss some of the details of Siegel’s account about what grounds the epistemic status of experience (§2) and how that status is inferentially modulated (§3). Although this raises some doubts about the specific way in which Siegel cashes out the rationality of perception, the core idea remains an interesting open possibility. (shrink)

Ordinarily, people take themselves to know a lot. I know where I was born, I know that I have two hands, I know that two plus two equals four, and I also think I know a lot of other stuff too. However, the project of trying to provide a philosophically satisfying account of knowledge, one that holds up against skeptical challenges, has proven surprisingly difficult. Either one aims for an account of justification (and knowledge) that is epistemologically demanding, in an (...) effort to offer an account that satisfactorily addresses skepticism, or one aims for an account of justification (and knowledge) that makes sense of our ordinary knowledge claims. However, the history of contemporary epistemology tells us that you cannot have both: the former results in skepticism, the latter in an unsatisfying response to skepticism. -/- What we find, in the array of contemporary attempts to give accounts of knowledge and justification, are numerous views spread across the internalism/externalism spectrum that deal with the dilemma of the previous paragraph in different ways. Most of them are guided by the goal of accommodating our ordinary knowledge claims. This is especially true of externalist accounts, but many internalist accounts are guided by this same goal, though perhaps to a lesser degree. One kind of internalist view stands out for its insistence on providing philosophically satisfying accounts of knowledge and justification, even if doing so has skeptical implications. This is the traditional, old-fashioned, Cartesian-style internalism that was so prominent in the early 20th century and is now a minority position. -/- Unlike competing versions of epistemic internalism, the guiding principle of traditional, Cartesian-style internalism (what I will henceforth call ‘traditional internalism’) is not to accommodate our commonsense views about the rationality of our ordinary beliefs. Instead, traditional internalism emphasizes rationality’s demand for philosophical assurance, on the basis of evidence that can withstand the strongest skeptical challenges, that our ordinary beliefs (perceptual and otherwise) are true. According to the traditional internalist, the philosopher, qua philosopher, ought to begin the epistemological project from the inside, placing a premium on satisfying our philosophical curiosity. -/- Despite the relative unpopularity of traditional internalism the view can be taken to be worthy of attention for a variety of reasons. First, traditional internalism has great historical importance. Significant portions of the history of contemporary epistemology, and to a lesser degree philosophy in the modern era (roughly, Descartes to Kant), are grounded in a number of the intuitions that drive traditional internalism. Second, and perhaps even more importantly, traditional internalism serves as the source of a wide variety of criticisms for other, more prominent, contemporary epistemological views. In a number of debates the views of the traditional internalist are used to play a kind of Devil’s advocate. Finally, some of the ideas that ground traditional internalism have had a bit of resurgence of late.1 To put it simply, traditional internalism refuses to go away. In this introduction, I will do three things. First, I will situate traditional internalism among other competing versions of internalism by highlighting the ways in which traditional internalism differs from them (in particular, evidentialism and conservatism). Second, I will explain more carefully some of the central tenets of traditional internalism and what motivates them. Third, I will highlight some of the difficulties that threaten traditional internalism, and I will explain how the contributions to this volume interact with those difficulties. -/- The goal of this volume is to test again the staying power of traditional internalism, to see if this once historically prominent view deserves another look, to see if traditional internalism is a legitimate contender providing useful criticisms of more prominent views, or, if instead it is time for traditional internalism to be left by the wayside. (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 →.

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.

My dissertation develops and defends a theory of how experience justifies perceptual beliefs. First, I situate the opposition, the coherentists, in the contemporary debate, and I do this partly by reference to their readings of Kant. According to the coherentists, perceptual beliefs can be justified only by other beliefs. They consider Kant as a predecessor who, in one way or another, did not quite succeed in freeing himself from the notion that perceptual beliefs are justified by our experience of the (...) world. I argue that Kant's refusal to "free" himself from this notion is legitimate, and that we ought to return to Kant's work to diagnose and overcome the excesses of coherentism. I try to make the Kantian view more convincing by bringing out a central problem with coherentism. Taking my bearings from Wittgenstein's later philosophy, I argue that the coherentist thesis is problematic, since it either leads to a troubling regress or fails to preserve the commonsense intuition that perceptual beliefs are justified by our experience of the world. I argue that the Kantian view can be saved from the most common coherentist criticisms, and that it is worth saving precisely because it avoids the regress while preserving the aforementioned intuition. (shrink)

THE PAPER IS UNDER REVIEW BY THE INTERNET ENCYCLOPEDIA OF PHILOSOPHY. WE HAVE RE-SUBMITTED HOPEFULLY THE FINAL VERSION. -/- .

A summary of The Rationality of Perception, and my replies to symposium papers on it by Andy Clark and Christopher Peacocke.

The question I am interested in is this. What exactly is the role of conscious experience in the acquisition of knowledge on the basis of perception? The problem here, as I see it, is to solve simultaneously for the nature of this experience, and its role in acquiring and sustaining the relevant beliefs, in such a way as to vindicate what I regard as an undeniable datum, that perception is a basic source of knowledge about the mind-independent world, in a (...) sense of ‘basic’ which is also to be elucidated. I shall sketch the way in which I think that this should be done. In section I, I argue that perceptual experiences must provide reasons for empirical beliefs. In section II, I explain how they do so. My thesis is that a correct account of the sense in which perceptual experiences are experiences of mind-independent things is itself an account of the way in which they provide peculiarly basic reasons for beliefs about the world around the perceiver. (shrink)

In this dissertation, I provide an interpretation and defense of Merleau-Ponty's thesis of the primacy of perception, namely, the thesis that all knowledge is founded in perceptual experience. I take as an interpretative and argumentative key Merleau-Ponty's phenomenological conception of motivation. Whereas epistemology has traditionally accepted a dichotomy between reason and natural causality, I show that this dichotomy is not exhaustive of the forms of epistemic grounding. There is a third type of grounding, the one characteristic of the grounding relations (...) found in perception: motivation. I argue that introducing motivation as a form of epistemic grounding allows us to see how Merleau-Ponty's thesis of the primacy of perception avoids both rationalism and empiricism. Whereas empiricism has argued that all the content of our knowledge is grounded in causal interactions between the world and our senses, and rationalism has held that experience does not suffice as a reason for knowledge, thinking of the relation between experience and knowledge in terms of motivation accommodates the best insights of rationalism and empiricism. Motivation allows us to see how knowledge can be grounded in experience without the content of knowledge being reducible to that of experience. (shrink)

Amodal completion is the representation of occluded parts of perceived objects. We argue for the following three claims: First, at least some amodal completion-involved experiences can ground knowledge about the occluded portions of perceived objects. Second, at least some instances of amodal completion-grounded knowledge are not sensitive, i.e., it is not the case that in the nearest worlds in which the relevant claim is false, that claim is not believed true. Third, at least some instances of amodal completion grounded knowledge (...) are not safe, i.e., it is not the case that in all or nearly all near worlds where the relevant claim is believed true, that claim is in fact true. Thus, certain instances of amodal completion-grounded knowledge refute both the view that knowledge is necessarily sensitive and the view that knowledge is necessarily safe. (shrink)

ABSTRACTRational agents have consistent beliefs. Bayesianism is a theory of consistency for partial belief states. Rational agents also respond appropriately to experience. Dogmatism is a theory of how to respond appropriately to experience. Hence, Dogmatism and Bayesianism are theories of two very different aspects of rationality. It's surprising, then, that in recent years it has become common to claim that Dogmatism and Bayesianism are jointly inconsistent: how can two independently consistent theories with distinct subject matter be jointly inconsistent? In this (...) essay I argue that Bayesianism and Dogmatism are inconsistent only with the addition of a specific hypothesis about how the appropriate responses to perceptual experience are to be incorporated into the formal models of the Bayesian. That hypothesis isn't essential either to Bayesianism or to Dogmatism, and so Bayesianism and Dogmatism are jointly consistent. That leaves the matter of how experiences and credences are related, a... (shrink)

Since Wilfrid Sellars' attack on sense-date theories, it became hard to understand the role of perceptual experience in the justification of beliefs about the world. Many philosophers have started to sustain that experience only causes beliefs, never justifies them. In this thesis, I defend that experience justifies empirical beliefs non-inferentially. I work out three senses of 'justification': basement, reason and warrant. The idea is that experience can be a reason to believe. The subject can base upon his experience in order (...) to form or hold a belief about the world. The distinction between vehicle and content has a important role in this thesis. Perceptual experience and belief are representational vehicles. Both can hold the same content. By this step I can explain the relevance of experience content to the truth of the belief. It is also necessary to explain how an experience can be a reason to believe in the first-person perspective. The inference model shows how a belief can be a reason for another belief. Nevertheless, the inference model can not be used to explain the transition from a perceptual state to a doxastic state, because experience can be a non-conceptual vehicle. Following Evans, I submit that the conceptualization act involved in the formation of a belief about the world is the key for understanding how experience can be a reason to believe, that is, how the transition from a perceptual state to a doxastic state can be rational. The empiricism defended is minimal. Although experience works as an unconditioned justifier for beliefs about the world, beliefs thus justified are not incorrigible. (shrink)

According to Fumerton in his "How Does Perception Justify Belief?", it is misleading or wrong to say that perception is a source of justification for beliefs about the external world. Moreover, reliability does not have an essential role to play here either. I agree, and I explain why in section 1, using novel considerations about evil demon scenarios in which we are radically deceived. According to Fumerton, when it comes to how sensations or experiences supply justification, they do not do (...) so on their own, and instead only do so only in conjunction with support for background beliefs about how the sensations or experiences are best explained. Here I disagree. In section 2, I first clarify the question of whether sensations or experiences provide justification on their own. I then respond to Fumerton’s arguments that use considerations about concept-possession and about how to close possible gaps between experience and truth. In section 3, I develop my main concern about his positive view, where that concern also brings out some of the merits of the view that experiences do justify beliefs about the external world on their own. (shrink)

This paper begins with a Davidsonian puzzle in the epistemology of perception and introduces two solutions to that puzzle: the Truth-Maker View (TMV) and the Content Model. The paper goes on to elaborate (TMV), elements of which can be found in the work of Kalderon (2011) and Brewer (2011). The central tenant of (TMV) is the claim that one's reason for one's perceptual belief should, in all cases, be identified with some item one perceives which makes the proposition believed true. (...) I defend an argument against (TMV) which appeals to (a) the claim that the reason for which one believes should always to be identified with the explanans of the rationalising explanation to which one's belief is subject and (b) the claim that the explanantia of rationalising explanations must be identified with truths. I finish by replying to two objections to the argument. (shrink)

Includes a summary of my book *The Rationality of Perception* (Oxford, 2017) and replies to commentaries on it by Endre Begby, Harmen Ghijsen, and Katia Samoilova. These commentaries and my summary and replies will be published soon in Analysis Reviews. Begby focuses on my analysis of the epistemic features of the interface between individual minds and their cultural milieu (discussed in chapter 10 of *The Rationality of Perception*), Ghijsen focuses on the notion of inference and reliabilism (chapters 5 and 6), (...) and Samoilova focuses on the relationship between epistemic charge (chapter 3) and shifts in the amount of justification needed for knowledge. (shrink)

According to Duncan Pritchard’s version of epistemological disjunctivism, in paradigm cases of perceptual knowledge, one’s knowledge that p is grounded in one’s seeing that p, and one can, by reflection alone, come to know that they see that p. In this paper, I argue that the epistemic conception of introspective indiscriminability is incompatible with epistemological disjunctivism, so understood. This has the consequence that theories of the nature of sensory experience which accept the epistemic conception of introspective indiscriminability—such as phenomenal character (...) disjunctivism and certain forms of naïve realism—are inconsistent with epistemological disjunctivism, so understood. I then argue that proponents of epistemological disjunctivism face a formidable challenge explaining in what sense, if any, one can have purely reflective knowledge of their factive rational support. (shrink)

I offer an epistemic framework for theorising about faith. I suggest that epistemic faith is a disposition to believe or infer according to particular methods, despite a kind of tendency to perceive an epistemic shortcoming in that method. Faith is unjustified, and issues into unjustified beliefs, when the apparent epistemic shortcomings are actual; it is justified when the epistemic worries are unfounded. -/- Virtuous faith is central to a great deal of epistemology. A rational agent will manifest faith in their (...) perceptual abilities, in determining which experts and testifiers to trust, in their a priori reasoning, and in the epistemic capacities that are specific to their social environment. To ignore faith is to ignore a crucial element of our social and individualistic epistemic lives. -/- One exercises faith when one forms beliefs despite a kind of apparent epistemic shortcoming, which may or may not correspond to a genuine weakness in evidential support. For example, standing on a bridge one knows to be safe, despite one’s natural but irrational fear, can manifest a kind of epistemic faith. So too can forming perceptual beliefs, or engaging in logical inferences, despite lacking a dialectically satisfying response to skeptical arguments. The same goes for beliefs that are informed by one’s ideological stance—these too count as a manifestation of faith, and under some circumstances, such faith is epistemically appropriate. -/- One upshot of my project will be that an intuitively appealing neutrality ideal for education and discourse is untenable. I’ll conclude with some discussion of practical questions about whether, when, and why it can be worthwhile engaging seriously with people who have radically opposed views and frameworks. (shrink)

This paper attempts to defend perceptual dogmatism (PD), a theory of epistemic justification, from three objections: (1) the subject's perspective objection (SPO), (2) the problem of easy justification, and (3) the objection from cognitive penetration. The SPO charges PD with allowing for a subject to be justified in his belief that P even when P is accidentally true from the subject's perspective. The problem of easy justification claims that intuitively, PD is too permissive in granting justification for beliefs about the (...) external world, such that a subject can come to have justification for the reliability of his/her perceptual faculties by trivial entailment and/or bootstrapping. The objector claims that the reasoning from the belief about the external world to the belief about reliability is sound, but the justification was arrived at too easily. The objection from cognitive penetration claims that prior mental states can cause a subject to have certain perceptual experiences. If perceptual experiences are supposed to be justification conferring, then there ought to be constraints on the etiology of the experience because inappropriate mental states can cause experiences that intuitively are not justification conferring. I offer some arguments guarding against these objections. (shrink)

William Alston claimed that epistemic considerations are relevant to theorizing about the metaphysics of perceptual experience. There must be something about the intrinsic nature of a perceptual experience that explains why it is that it justifies one in believing what it does, rather than other propositions. A metaphysical theory of experience that provides the resources for such an explanation is to be preferred over ones that do not. Alston argued that the theory of appearing gains a leg up on its (...) rivals, particularly sense-datum theory and adverbialism, precisely on this score. This paper examines these claims, along with the further question of whether the theory of appearing fares better epistemologically than the currently popular theory of intentionalism about perceptual experience. I conclude that while Alston is correct that the theory of appearing fares better than its traditional rivals, it does not clearly fare better than intentionalism. I further argue that Alston ignores a number of complexities in his account of how perceptual experience, construed as states of objects appearing certain ways to subjects, justifies perceptual beliefs. (shrink)

Perceptual experiences justify beliefs. A perceptual experience of a dog justifies the belief that there is a dog present. But there is much evidence that perceptual states can occur without being conscious, as in experiments involving masked priming. Do unconscious perceptual states provide justification as well? The answer depends on one’s theory of justification. While most varieties of externalism seem compatible with unconscious perceptual justification, several theories have recently afforded to consciousness a special role in perceptual justification. We argue that (...) such views face a dilemma: either consciousness should be understood in functionalist terms, in which case our best current theories of consciousness do not seem to imbue consciousness with any special epistemic features, or it should not, in which case it is mysterious why only conscious states are justificatory. We conclude that unconscious perceptual justification is quite plausible. (shrink)