In The Epistemic Role of Consciousness, Declan Smithies develops a systematic, cohesive account of beliefs, phenomenal consciousness, epistemic justification, and rationality. The arguments for the various elements of the account are extremely rigorous, and the account is impressively broad in scope. This commentary will focus on Smithies’ views about self-knowledge. Specifically, I will examine his case for the striking thesis that rational thinkers will know all their beliefs. I call this the ubiquity of self-knowledge thesis. Smithies’ case for this thesis is an important pillar of his larger project, as it bears on the nature of justification and our ability to fulfill the requirements of rationality.

A primary goal of this chapter is to correct a widespread misunderstanding about how epistemic issues shape the debate between dualists and physicalists. According to a familiar picture, dualism is motivated by armchair reflection, and dualists accord special significance to our ways of conceptualizing consciousness and the physical. In contrast, physicalists favor empirical data over armchair reflection, and physicalism is a relatively straightforward extension of scientific theorizing. This familiar picture is inaccurate. Both dualist and physicalist arguments employ a combination of empirical data and armchair reflection; both rely on considerations stemming from how we conceptualize certain phenomena; and both aim to establish views that are compatible with scientific results but go well beyond the deliverances of empirical science. My discussion highlights these neglected epistemic parallels between dualism and physicalism, and reveals the fine-grained epistemic commitments that motivate dualism and physicalism, respectively.

Some physicalists (Balog 2012, Howell 2013), and most dualists, endorse the acquaintance response to the Knowledge Argument. This is the claim that Mary gains substantial new knowledge, upon leaving the room, because phenomenal knowledge requires direct acquaintance with phenomenal properties. The acquaintance response is an especially promising way to make sense of the Mary case. I argue that it casts doubt on two claims often made on behalf of physicalism, regarding parsimony and mental causation. I show that those who endorse the acquaintance response face special obstacles to invoking parsimony in an argument for physicalism. And I show how acknowledging the phenomenon of acquaintance can ease the dualist’s problems with mental causation, by dispelling three key objections to epiphenomenalism. The most challenging of these objections is that epiphenomenalism blocks an evolutionary explanation of the so-called “hedonic/utility match”. I propose that pleasures and pains, while themselves epiphenomenal, can nonetheless explain positive and negative associations with stimuli, associations that can contribute to fitness.

How do we know our own beliefs, intentions, and other attitudes? According to empiricism, such self-knowledge is based in empirical justification or warrant. Agentialists charge that empiricism portrays us as mere observers of a passing cognitive show, and thereby neglects the fact that believing and intending are things we do, for reasons. They maintain that our capacity for self-knowledge derives from our rational agency—our ability to conform our attitudes to our reasons, and to commit ourselves to those attitudes through avowals (Burge 1996; Moran 2001; Bilgrami 2006; Boyle 2009). This paper has two goals. The first is clarificatory: to identify agentialism’s defining thesis and precisely formulate the agentialist challenge to empiricism. The second goal is to defend empiricism from the agentialist challenge. I propose that the phenomena the agentialist associates with believing and intending are, in fact, features of agency more generally. These features are present when a subject’s reasons for acting can issue in action directly. My proposal is compatible with empiricism about self-knowledge. So empiricism can do justice to the idea that believing and intending are exercises of rational agency.

With this provocative book, Cassam aims to reorient the philosophical study of self-knowledge so as to bring its methodology and subject matter into line with recognizably human concerns. He pursues this reorientation on two fronts. He proposes replacing what he sees as the field’s standard subject, an ideally rational being he calls Homo Philosophicus, with a realistic version of Homo Sapiens. And he proposes shifting the field’s primary focus from “narrow epistemological concerns” to issues reflecting “what matters to humans”, such as knowledge of one’s own character and the moral significance of self-knowledge. Cassam also contributes to this field, advancing his own accounts of self-knowledge’s epistemology and value. A particular virtue of the book is its unwavering insistence that philosophical views about self-knowledge must be judged by their fidelity to what self-knowledge actually is, namely, an untidy phenomenon in the lives of cognitively limited creatures. Cassam’s realist outlook is sensible and refreshing, and his effort to bring philosophical attention to neglected issues about self-knowledge is commendable. But I have reservations about the book’s framing conceits: that taking seriously how humans actually think amounts to a “radical reorientation of the philosophy of self-knowledge”, and that the choice to focus one’s theorizing about self-knowledge on epistemological issues is indefensible.

Feldman and Conee (2001) observed that the term “internalism”, as used in epistemology, is ambiguous. It sometimes denotes the view that justification supervenes on factors within the thinker (“mentalism”), whereas at other times it refers to the view that justification is accessible to the thinker (“accessibilism”). As used in the debate about mental content, “internalism” corresponds to mentalism. Strikingly, however, it is the question of accessibilism that is the target of many internalist and externalist arguments. In this paper I argue that the focus on thinkers’ access to their thoughts is misplaced. The debate between externalism and internalism hinges on the significance of external factors for rational relations between first-orderthoughts, not on issues of accessibility. The shift away from issues of accessibility neutralizes both the “incompatibility” objection to externalism and the charge that internalism overestimates first-person access. The revised understanding of the debate supports a broadly Fregean approach to individuating cognitive values. I develop a version of this approach and defend it from a prominent externalist objection. Since this approach individuates cognitive values narrowly, my argument ultimately supports internalism.

I elaborate and defend a set of metaphysical and epistemic claims that comprise what I call the acquaintance approach to introspective knowledge of the phenomenal qualities of experience. The hallmark of this approach is the thesis that, in some introspective judgments about experience, (phenomenal) reality intersects with the epistemic, that is, with the subject’s grasp of that reality. In Section 1 of the paper I outline the acquaintance approach by drawing on its Russellian lineage. A more detailed picture of the approach emerges in succeeding sections, which respond to a range of objections. Some critics charge that approaches of this sort are overly idealized, in that they ignore the cognitive flaws and limitations of actual human beings. I begin to address these worries in Section 2, by arguing that the epistemic commitments of the acquaintance approach are in fact relatively modest. In Section 3, I sketch a picture of introspective reference that explains how phenomenal reality can intersect with the epistemic in a phenomenal judgment, as the acquaintance approach requires. Drawing on this picture of introspective reference, Section 4 sets out a practical strategy for achieving knowledge by acquaintance. Some contemporary acquaintance theorists (BonJour 2003, Fumerton 1996) employ demanding epistemic standards for knowledge by acquaintance, standards beyond those mandated by the acquaintance approach. In Section 5 I show that instances of introspective knowledge that meet less demanding standards can satisfy the acquaintance approach’s epistemic commitments. The final sections concern the most direct challenges to the acquaintance approach, which target the claim that phenomenal reality intersects with the epistemic. According to one such challenge, this claim is belied by the fact that possessing a phenomenal concept is a matter of having certain dispositions. Section 6 draws on a discussion by Sosa (2003) to articulate this challenge, and responds to it on behalf of the acquaintance approach. Section 7 addresses Stalnaker’s (2008) worry that, if phenomenal reality intersected with the epistemic, phenomenal information would be incommunicable.