With some help from the commentators, a few adjustments to the characterizations of A-consciousness and P-consciousness can avoid some trivial cases of one without the other. But it still seems that the case for the existence of P without A is stronger than that for A without P. If indeed there can be P without A, but not A without P, this would be a remarkable result that would need explanation.

How can we disentangle the neural basis of phenomenal consciousness from the neural machinery of the cognitive access that underlies reports of phenomenal consciousness? We can see the problem in stark form if we ask how we could tell whether representations inside a Fodorian module are phenomenally conscious. The methodology would seem straightforward: find the neural natural kinds that are the basis of phenomenal consciousness in clear cases when subjects are completely confident and we have no reason to doubt their (...) authority, and look to see whether those neural natural kinds exist within Fodorian modules. But a puzzle arises: do we include the machinery underlying reportability within the neural natural kinds of the clear cases? If the answer is ‘Yes’, then there can be no phenomenally conscious representations in Fodorian modules. But how can we know if the answer is ‘Yes’? The suggested methodology requires an answer to the question it was supposed to answer! The paper argues for an abstract solution to the problem and exhibits a source of empirical data that is relevant, data that show that in a certain sense phenomenal consciousness overflows cognitive accessibility. The paper argues that we can find a neural realizer of this overflow if assume that the neural basis of phenomenal consciousness does not include the neural basis of cognitive accessibility and that this assumption is justified by the explanations it allows. (shrink)

Descartes was certain that he was thinking and he was accordingly certain that he existed. Like Descartes, we seem to be more certain of our thoughts and our existence than of anything else. What is less clear is the reason why we are thus certain. Philosophers throughout history have provided different interpretations of the cogito, disagreeing both on the kind of thoughts it characterizes and on the reasons for its cogency. According to what we may call the empiricist interpretation of (...) the cogito, I can only claim to be certain of having experiences, and this certainty, as well as that of my own existence, stems from their phenomenal and subjective character. According to rationalist interpretations, on the other hand, I am certain of having some self-reflexive propositional attitudes, and this certainty derives from their rational features. Psychiatric patients suffering from acute forms of depersonalization or of the Cotard syndrome often doubt that they think and exist, and might even believe that they don't. I argue that their study allows us to favor the empiricist interpretation of the cogito. (shrink)

(1) Jenny is coming to visit me tonight. (2) I’m going to visit Jenny tonight. In these examples, it is where I am (my home, let us suppose) that is the center of the coming and going. This may suggest that the perspective point is always the perspective of the speaker, and that comings are always towards the speaker and that goings are away from the location of the speaker. But this isn’t necessarily so. For example, suppose that a colleague (...) from work calls me at home to find out why I’m late for a meeting. I could reply. (shrink)

This paper considers the problem of assigning meanings to empty natural kind terms. It does so in the context of the Twin-Earth externalist-internalist debate about whether the meanings of natural kind terms are individuated by the external physical environment of the speakers using these terms. The paper clarifies and outlines the different ways in which meanings could be assigned to empty natural kind terms. And it argues that externalists do not have the semantic resources to assign them meanings. The paper (...) ends on a sceptical note concerning the fruitfulness of using the Twin-Earth setting in debates about the semantics of empty natural kind terms. (shrink)

It is now 25 years since Gareth Evans introduced the distinction between conceptual and nonconceptual content in The Varieties of Reference. This is a fitting time to take stock of what has become a complex and extended debate both within philosophy and at the interface between philosophy and psychology. Unfortunately, the debate has become increasingly murky as it has become increasingly ramified. Much of the contemporary discussion does not do full justice to the powerful theoretical tool originally proposed by Evans (...) and subsequently refined by theorists in the late 1980’s and early 1990’s – most effectively, I think, by Christopher Peacocke (particularly in his 1992). Even worse, significant parts of the discussion are somewhat confused. This paper makes a start on clarifying what I think ought to be the central issues in debates about nonconceptual content. I begin in §1 by pointing out how narrowly focused contemporary discussion is relative to Evans’s original discussion. We are not making as much use as we should of nonconceptual content as a tool for understanding subpersonal information processing and the complexities of its status relative to perception and thought at the personal level. In §2 I turn to what is the central focus of contemporary discussion, namely, the content of perception and identify a “master argument” for nonconceptualism based on the relation between conceptual capacities and capacities for perceptual discrimination. The aim of §3 is to clarify the relation between the claim that perception has nonconceptual content and some superficially similar claims discussed by philosophers of perception. Finally, in §4 I explain why the attention recently focused on what is sometimes called the state version of the nonconceptualist thesis seems to me to be misdirected. (shrink)

This paper challenges the standard conception of memory as a form of knowledge. Unlike knowledge, memory implies neither belief nor justification.

This paper argues that, while there is a difference between personal and sub-personal explanation, claims of autonomy should be treated with scepticism. It distinguishes between horizontal and vertical explanatory relations that might hold between facts at the personal and facts at the sub-personal level. Noting that many philosophers are prepared to accept vertical explanatory relations between the two levels, I argue for the stronger claim that, in the case of at least three central personal level phenomena, the demands of explanatory (...) adequacy require postulating horizontal explanatory relations. (shrink)

There is general agreement that from the first few months of life, our apprehension of physical objects accords, in some sense, with certain principles. In one philosopher's locution, we are 'perceptually sensitive' to physical principles describing the behavior of objects. But in what does this accordance or sensitivity consist? Are these principles explicitly represented or merely 'implemented'? And what sort of explanation do we accomplish in claiming that our object perception accords with these principles? My main goal here is to (...) suggest answers to these questions. I argue that the object principles are not explicitly represented, first addressing some confusion in the debate about what that means. On the positive side, I conclude that the principles supply a competence account, at Marr's computational level, and that they function like natural constraints in vision. These are among their considerable explanatory benefits - benefits endowed by rules and principles in other cognitive domains as well. Characterizing the explanatory role of the object principles is my main project here, but in pursuing certain sub-goals I am led to other conclusions of interest in their own right. I address an argument that the object principles are explicitly represented which assumes that object perception is substantially thought-like. This provokes a jaunt off the main path which leads to interesting territory: the boundary between thought and perception. I argue that object apprehension is much closer to perception than to thought on the spectrum between the two. (shrink)

Content externalism about memory says that the individuation of memory contents depends on relations the subject bears to his past environment. I defend externalism about memory by arguing that neither philosophical nor psychological considerations stand in the way of accepting the context dependency of memory that follows from externalism.

Autobiographical memories typically give rise either to memory reports (“I remember going swimming”) or to first person past-tense judgements (“I went swimming”). This article focuses on first person past-tense judgements that are (epistemically) based on autobiographical memories. Some of these judgements have the IEM property of being immune to error through misidentification. This article offers an account of when and why first person past-tense judgements have the IEM property.

Mandik (2012)understands color-consciousness conceptualism to be the view that one deploys in a conscious qualitative state concepts for every color consciously discriminated by that state. Some argue that the experimental evidence that we can consciously discriminate barely distinct hues that are presented together but cannot do so when those hues are presented in short succession suggests that we can consciously discriminate colors that we do not conceptualize. Mandik maintains, however, that this evidence is consistent with our deploying a variety of (...) nondemonstrative concepts for those colors and so does not pose a threat to conceptualism. But even if Mandik has shown that we deploy such concepts in these experimental conditions, there are cases of conscious states that discriminate colors but do not involve concepts of those colors. Mandik’s arguments sustain only a theory in the vicinity of conceptualism: The view that we possess concepts for every color we can discriminate consciously, but need not deploy those concepts in every conscious act of color discrimination. (shrink)

The conception of disinterested pleasure is not only central to Kant’s theory of beauty but also highly influential in contemporary philosophical discourse about beauty. However, it remains unclear, what exactly disinterested pleasure is and what role it plays in experiences of beauty. This volume sheds new light on the conception of disinterested pleasure from the perspectives of both Kant scholarship and contemporary aesthetics. In the first part, the focus is on Kant’s theory of beauty as grounded on the conception of (...) disinterested pleasure. In the second part, disinterested pleasure is investigated in the light of contemporary debates on beauty. The third part is dedicated to the relation of theories of disinterested pleasure to the meta-aesthetical debate between realism and anti-realism. The volume clarifies the meaning, role, and implications of one of the most influential conceptions in traditional as well as contemporary approaches to beauty. (shrink)

In a recent paper, Fredérique de Vignemont has argued that there is a positive quale of bodily ownership . She thinks that tactile and other forms of somatosensory phenomenology incorporate a distinctive feeling of myness and takes issue with my defense in Bermúdez of a deflationary approach to bodily ownership. That paper proposed an argument deriving from Elizabeth Anscombe’s various discussions of what she terms knowledge without observation . De Vignemont is not convinced and appeals to the Rubber Hand Illusion (...) to undercut my appeal to Anscombe. Section 1 of this article restates the case against the putative quale of ownership. Section 2 explains why de Vignemonts’ objections miss the mark. Section 3 discusses in more detail how to draw a principled distinction between bodily awareness and ordinary perceptual awareness. (shrink)

Debates about bodily ownership and psychological ownership have typically proceeded independently of each other. This paper explores the relation between them, with particular reference to how each is illuminated by psychopathology. I propose a general framework for studying ownership that is applicable both to bodily ownership and psychological ownership. The framework proposes studying ownership by starting with explicit judgments of ownership and then exploring the bases for those judgments. Section 3 discusses John Campbell’s account of ψ-ownership in the light of (...) that general framework, emphasizing in particular his fractionation of ψ-ownership into two dissociable components. Section 4 briefly presents an account of φ-ownership that I have developed in more detail elsewhere. Section 5 explores the suggestion, originating with Alexandre Billon, that there needs to be an integrated account of φ-ownership and ψ-ownership because depersonalization disorders typically involve breakdowns of both φ-ownership and ψ-ownership. The argument from depersonalization is not compelling, but Section 6 proposes a different way of reaching the same conclusion. Section 7 shows how reflecting on agency and practical reasoning offers a common thread between the models of φ-ownership and ψ-ownership discussed earlier in the paper. (shrink)

This article argues that bodily awareness is a basic form of self-consciousness through which perceiving agents are directly conscious of the bodily self. It clarifies the nature of bodily awareness, categorises the different types of body-relative information, and rejects the claim that we can have a sense of ownership of our own bodies. It explores how bodily awareness functions as a form of self-consciousness and highlights the importance of certain forms of bodily awareness that share an important epistemological property with (...) canonical forms of self-consciousness such as introspection. (shrink)

Are kind properties presented to us in visual experience? I propose an account of kind recognition that incorporates two conflicting intuitions: Kind properties a...

Two-dimensional semantics aims to eliminate the puzzle of necessary a posteriori and contingent a priori truths. Recently many argue that even assuming two-dimensional semantics we are left with the puzzle of necessary and a posteriori propositions. Stephen Yablo (Pacific Philosophical Quarterly, 81, 98–122, 2000) and Penelope Mackie (Analysis, 62(3), 225–236, 2002) argue that a plausible sense of “knowing which” lets us know the object of such a proposition, and yet its necessity is “hidden” and thus a posteriori. This paper answers (...) this objection; I argue that given two-dimensional semantics you cannot know a necessary proposition without knowing that it is true. (shrink)

In this paper we advocate the thesis that qualia are tropes (or qualitons), and not (universal) properties. The main advantage of the thesis is that we can accept both the Wittgensteinian and Sellarsian assault on the given and the claim that only subjective and private states can do justice to the qualitative character of experience. We hint that if we take qualia to be tropes, we dissolve the problem of inverted qualia. We develop an account of sensory concept acquisition that (...) takes the presence of qualia as an enabling condition for learning. We argue that qualia taken to be qualitons are part of our mechanism of sensory concept acquisition. (shrink)

The controversy over the interpretative issue—is Thomas Reid a perceptual direct realist?—has recently had channelled into it a host of imaginative ideas about what direct perception truly means. Paradoxically enough, it is the apparent contradiction at the heart of his view of perception which keeps teasing us to review our concepts: time and again, Reid stresses that the very idea of any mental intermediaries implies scepticism, yet, nevertheless insists that sensations are signs of objects. But if sensory signs are not (...) mental intermediaries, what are they? Hasn't Reid merely swapped the common ‘sensation’ for the notorious ‘idea’, ending up with indirect realism?1 Current imaginative strategies answer negatively: Reid's sensory sign does not contradict direct perception, and those who think otherwise merely fail to understand what it means. (shrink)

How does the concept of a person affect our beliefs about ourselves and the world? In an intriguing recent addition to his established Reductionist view of personal identity, Derek Parfit speculates that there could be beings who do not possess the concept of a person. Where we talk and think about persons, selves, subjects, or agents, they talk and think about sequences of thoughts and experiences related to a particular brain and body. Nevertheless their knowledge and experience of the world (...) is unaffected, in that it is largely like our own. It is their view of ‘themselves’ that is different (and superior) to ours. My paper critically assesses this ‘impersonal beings’ hypothesis through an examination of Parfit’s construal of the concept of a person. I argue that Parfit’s understanding of the concept of a person undermines his impersonal beings hypothesis. (shrink)

John Morrison has argued that confidences are assigned in perceptual experience. For example, when you perceive a figure in the distance, your experience might assign a 55-percent confidence to the figure’s being Isaac. Morrison’s argument leans on the phenomenon of ‘completely trusting your experience’. I argue that Morrison presupposes a problematic ‘importation model’ of this familiar phenomenon, and propose a very different way of thinking about it. While the article’s official topic is whether confidences are assigned in perceptual experience, it (...) is also about two more general issues: how we can determine which properties are assigned in perceptual experience; and how we transition from perception to belief. (shrink)

This paper surveys and evaluates the answers that philosophers and animal researchers have given to two questions. Do animals have thoughts? If so, are their thoughts conceptual? Along the way, special attention is paid to distinguish debates of substance from mere battles over terminology, and to isolate fruitful areas for future research.

Empirical discussions of mental representation appeal to a wide variety of representational kinds. Some of these kinds, such as the sentential representations underlying language use and the pictorial representations of visual imagery, are thoroughly familiar to philosophers. Others have received almost no philosophical attention at all. Included in this latter category are analogue magnitude representations, which enable a wide range of organisms to primitively represent spatial, temporal, numerical, and related magnitudes. This article aims to introduce analogue magnitude representations to a (...) philosophical audience by rehearsing empirical evidence for their existence and analysing their format, their content, and the computations they support. 1 Background1.1 Evidence of analogue magnitude representations1.2 Weber’s law1.3 Scepticism about analogue magnitude representations2 Format2.1 Carey’s analogy2.2 Neural realization2.3 Analogue representation2.4 Analogue magnitude representation components3 Content3.1 Do analogue magnitude representations have representational content?3.2 What do analogue magnitude representations represent?3.3 What content types do analogue magnitude representations have?4 Computations4.1 Arithmetic computation4.2 Practical deliberation5 Conclusion. (shrink)

In a lengthy review article, C. Anthony Anderson criticizes the approach to property theory developed in Quality and Concept (1982). That approach is first-order, type-free, and broadly Russellian. Anderson favors Alonzo Church’s higher-order, type-theoretic, broadly Fregean approach. His worries concern the way in which the theory of intensional entities is developed. It is shown that the worries can be handled within the approach developed in the book but they remain serious obstacles for the Church approach. The discussion focuses on: (1) (...) the fine-grained/coarse-grained distinction, (2) proper names and definite descriptions, (3) the paradox of analysis and Mates’ puzzle, and (4) the logical, semantical, and intentional paradoxes. (shrink)

In ‘Swimming Happily in Chinese Logic’ (2021) I suggested that the root conception of knowing for the ancient Chinese Mohists was knowing-as, a conception that fits well with perspectivism in the Zhuangzi, a key Daoist text. Drawing on Wittgenstein’s discussion of both seeing-as and samples, and developing the analogy between seeing-as and knowing-as, I explore various forms of knowing with particular reference to the Mozi, in attempting to make sense of ancient Chinese epistemology and thereby shed light on the whole (...) phenomenon of knowing. (shrink)

A central debate in the philosophy of perception concerns the range of properties that can be represented in perceptual experience. Are the contents of perceptual experience restricted to ‘low-level’ properties such as location, shape and texture, or can ‘high-level’ properties such as being a tomato, being a pine tree or being a watch also be represented in perceptual experience? This paper explores the bearing of gist perception on the admissible contents debate, arguing that it provides qualified support for the claim (...) that certain kinds of high-level properties—such as being a natural scene —can be perceptually represented. (shrink)

Seattle rain smelled different from New Orleans rain…. New Orleans rain smelled of sulfur and hibiscus, trumpet metal, thunder, and sweat. Seattle rain, the widespread rain of the Great Northwest, smelled of green ice and sumi ink, of geology and silence and minnow breath.— Tom Robbins, Jitterbug PerfumeMuch of the philosophical literature on perception has focused on vision. This is not surprising, given that vision holds for us a certain prestige. Our visual experience is incredibly rich, offering up a mosaic (...) of apparent three-dimensional objects. For this reason, it is commonplace to suppose that visual experience is world-directed, with the view taking its most popular form in the representational, or content, view. World-directed views contrast with what we might call subjectivist views — views according to which experiences are raw feels or mere sensations. (shrink)

According to the transparency approach, achievement of self-knowledge is a two-stage process: first, the subject arrives at the judgment ‘p’; second, the subject proceeds to the judgment ‘I believe that p.’ The puzzle of transparency is to understand why the transition from the first to the second judgment is rationally permissible. After revisiting the debate between Byrne and Boyle on this matter, I present a novel solution according to which the transition is rationally permissible in virtue of a justifying argument (...) that begins from a premise referring to the mental utterance that is emitted in the course of judging ‘p.’. (shrink)

The paper aims to disarm arguments, prevalent in diverse philosophical contexts, that deny the legitimacy of attributions of propositional attitudes on the grounds that the putative subject lacks one or more of the requite concepts. Its strategy is to offer and defend an extremely minimal account on concept possession. The agenda of the paper broadens into a defence of the thesis that concepts are a linguistic epiphenomenon: talk about them emerges as the result of certain contingently available and pleonastic ways (...) of talking about propositional attitudes. (shrink)

The aim of this paper is to lay the groundwork for extending the idea of transparent introspection to wishes. First, I elucidate the notion of transparent introspection and highlight its advantages over rival accounts of self-knowledge. Then I pose several problems that seem to obstruct the extension of transparent introspection to wishes. In order to overcome these problems, I call into question the standard propositional attitude analysis of non-doxastic attitudes. My considerations lead to a non-orthodox account of attitudes in general (...) and wishes in particular in light of which the problems presented in Sect. 2 disappear. (shrink)

Contemporary discussions of self-knowledge share a presupposition to the effect that the only way to vindicate so-called first-person authority as understood by our folk-psychology is to identify specific “good-making” epistemic features that render our self-ascriptions of mental states especially knowledgeable. In earlier work, I rejected this presupposition. I proposed that we separate two questions: How is first-person authority to be explained? What renders avowals instances of a privileged kind of knowledge?In response to question, I offered a neo-expressivist account that, I (...) argued, is compatible with a variety of non-deflationary, substantive answers to question. Here I re-evaluate the relative merits of the neo-expressivist account in light of some recent attempts to capture first-person authority by appealing to the so-called transparency of mental self-attributions. I then canvass two recent appeals to transparency that give priority to question. Bearing in mind.. (shrink)

In my reply to Boyle, Rosenthal, and Tumulty, I revisit my view of avowals’ security as a matter of a special immunity to error, their character as intentional expressive acts that employ self-ascriptive vehicles, Moore’s paradox, the idea of expressing as contrasting with reporting and its connection to showing one’s mental state, and the ‘performance equivalence’ between avowals and other expressive acts.

This article deals with the cognitive relationship between a speaker and her internal grammar. In particular, it takes issue with the view that such a relationship is one of belief or knowledge (I call this view the ‘Propositional Attitude View’, or PAV). I first argue that PAV entails that all ordinary speakers (tacitly) possess technical concepts belonging to syntactic theory, and second, that most ordinary speakers do not in fact possess such concepts. Thus, it is concluded that speakers do not (...) literally ‘know’ or ‘believe’ much of the contents of their grammars, and moreover, that these contents can only be attributed at a subpersonal level. (shrink)

This paper critically examines currently influential transparency accounts of our knowledge of our own beliefs that say that self-ascriptions of belief typically are arrived at by “looking outward” onto the world. For example, one version of the transparency account says that one self-ascribes beliefs via an inference from a premise to the conclusion that one believes that premise. This rule of inference reliably yields accurate self-ascriptions because you cannot infer a conclusion from a premise without believing the premise, and so (...) you cannot infer from a premise that you believe the premise unless you do believe it. I argue that this procedure cannot be a source of justification, however, because one can be justified in inferring from p that q only if p amounts to strong evidence that q is true. This is incompatible with the transparency account because p often is not very strong evidence that you believe that p. For example, unless you are a weather expert, the fact that it will rain is not very strong evidence that you believe it will rain. After showing how this intuitive problem can be made precise, I conclude with a broader lesson about the nature of inferential justification: that beliefs, when justified, must be underwritten by beliefs, when justified, must be underwritten by evidential relationships between the facts or propositions which those beliefs represent. (shrink)

The aim of this article is to provide an account of introspective knowledge concerning visual experiences that is in accordance with the idea of transparent introspection. According to transparent introspection, a person gains knowledge of her own current mental state M solely by paying attention to those aspects of the external world which M is about. In my view, transparent introspection is a promising alternative to inner sense theories. However, it raises the fundamental question why a person who pays attention (...) to something extra-mental should be epistemically justified in holding a belief about something intra-mental. In his Naturalizing the Mind, Fred Dretske solves this problem by conceiving of introspection concerning visual experiences as an inference based on a connecting belief. Although Dretske's account proves defective upon closer inspection, its essence can be salvaged by looking upon introspection as being a game of make-believe. (shrink)

John McDowell rejects the idea that non-conceptual content can rationally justify empirical claims—a task for which it is ill-fitted by its non-conceptual nature. This paper considers three possible objections to his views: he cannot distinguish empty conception from the perceptual experience of an object; perceptual discrimination outstrips the capacity of concepts to keep pace; and experience of the empirical world is more extensive than the conceptual focusing within it. While endorsing McDowell’s rejection of what he means by non-conceptual content, and (...) appreciating his insight into the experiential synthesis of intuition and conception (in particular, its role in grasping objects), I will argue that Edmund Husserl presents an even more comprehensive account of perceptual experience that explains how we experience the contribution of receptivity and sensibility and how they cooperate in perceptual discrimination. Further, it reveals “horizons”—a unique kind of contents, surplus content (rather than independent non-conceptual content)—beyond the synthesis of intuitive and conceptual contents through which objects are grasped. Such horizons play a constitutive role, making experience with its conceptual dimensions and justificatory potential possible; they in no way function like a bare given that is to fulfill some independent justificatory role. Whereas McDowell focuses on how experience does not take place in isolation from the exercise of conceptual capacities, Husserl complements his view by situating experience in a more encompassing whole and by elucidating the surplus-horizons that exceed the conceptual content of experience; play an inseparable, constitutive role within it; and indicate the limits of conceptual comprehension. (shrink)

What I call “Rorty’s Dilemma” has us caught between the Scylla of Cartesian Dualism and the Charybdis of eliminativism about the mental. Proper recognition of what is distinctively mental requires accommodating incorrigibility about our mental states, something Rorty thinks materialists cannot do. So we must either countenance mental states over and above physical states in our ontology, or else give up altogether on the mental as a distinct category. In section 2, “Materialist Introspectionism—Independence and Epistemic Authority”, I review reasons for (...) being dissatisfied with materialist introspectionism as a way out of the dilemma. In section 3, “Constitutivism”, I outline two constitutivist alternatives to materialist introspectionism. In section 4, “A Neo-Expressivist View”, I offer my neo-expressivist view (defended in Bar-On, Speaking my mind: Expression and self-knowledge. Clarendon Press, Oxford, 2004 ), according to which the distinctive status of mental self-ascriptions is to be explained by appeal to the expressive character of acts of issuing them (in speech or in thought). This view, I argue, allows us to stay clear of eliminativism without committing to Cartesian substance dualism, thereby offering a viable way of slipping between the horns of Rorty’s dilemma. (shrink)

Suppose, as I stare at a glass in front of me, I say or think: There.

The aim of this paper is to show that introspective beliefs about one’s own current visual experiences are not immediate in the sense that what justifies them does not include other beliefs that the subject in question might possess. The argument will take the following course. First, the author explains the notions of immediacy and truth-sufficiency as they are used here. Second, the author suggests a test to determine whether a given belief lacks immediacy. Third, the author applies this test (...) to a standard case of formation of an introspective belief about one’s own current visual experiences and concludes that the belief in question is neither immediate nor truth-sufficient. Fourth, the author rebuts several objections that might be raised against the argument. (shrink)

In my reply to Boyle, Rosenthal, and Tumulty, I revisit my view of avowals’ security as a matter of a special immunity to error, their character as intentional expressive acts that employ self-ascriptive vehicles (without being grounded in self-beliefs), Moore’s paradox, the idea of expressing as contrasting with reporting and its connection to showing one’s mental state, and the ‘performance equivalence’ between avowals and other expressive acts.

It is widely believed that Twin-Earth-style thought experiments show that the contents of a person's thoughts fail to supervene on her intrinsic properties. Several recent philosophers have made the further claim that Twin-Earth-style thought experiments produce metaphysically necessary conditions for the possession of certain concepts. I argue that the latter view is false, and produce counterexamples to several proposed conditions. My thesis is of particular interest because it undermines some attempts to show that externalism is incompatible with privileged access.

Jonathan Schaffer (2010) has summoned a new sort of demon – which he calls the debasing demon – that apparently threatens all of our purported knowledge. We show that any debasing skeptical argument must attack the justification condition and can do so only if a plausible thesis about justification is false.