Brie Gertler

In self-attributing beliefs and desires, we exploit a method that is different from our methods for attributing such states to others. On one traditional diagnosis, this difference stems from the subject’s exclusive access to introspective evidence. Gallois rejects the “access to evidence” model of the epistemic difference between self-knowledge and other-knowledge; in this ambitious book he provides a non-introspectivist alternative account of first-person authority. His intriguing proposal is that rational subjects can know their consciously held propositional attitudes without observing their own states. While he allows that we sometimes have introspective evidence for our own propositional attitudes, he is deeply suspicious about the power often accorded to such evidence. Robust conceptions of rationality and state consciousness weigh heavily in Gallois’ arguments and, I think, threaten to trivialize his claim that we enjoy first-person authority. But by departing from introspectivist accounts of self-knowledge, Gallois has made a provocative opening move in a gambit which promises to advance our understanding of the epistemic difference between self-knowledge and other-knowledge.

"Self-knowledge" is commonly used in philosophy to refer to knowledge of one's particular mental states, including one's beliefs, desires, and sensations. It is also sometimes used to refer to knowledge about a persisting self -- its ontological nature, identity conditions, or character traits. At least since Descartes, most philosophers have believed that self-knowledge is importantly different from knowledge of the world external to oneself, including others' thoughts. But there is little agreement about what precisely distinguishes self-knowledge from knowledge in other realms. Partially because of this disagreement, philosophers have endorsed competing accounts of how we acquire self-knowledge. These accounts have important consequences for the scope of mental content, for mental ontology, and for personal identity.

The definitive statement of the Knowledge Argument was formulated by Frank Jackson, in a paper entitled “Epiphenomenal Qualia” that appeared in The Philosophical Quarterly in 1982. Arguments in the same spirit had appeared earlier (Broad 1925, Robinson 1982), but Jackson’s argument is most often compared with Thomas Nagel’s argument in “What is it Like to be a Bat?” (1974). Jackson, however, takes pains to distinguish his argument from Nagel’s. This entry will follow standard practice in focusing on Jackson’s argument, though I will also describe the main points of alleged similarity and dissimilarity between these two arguments.

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.

My dissertation has three interrelated aims: to defend introspectivism, the view that the deliverances of introspection should be basic data for philosophical theories of the mind, from pivotal objections which inspire the currently prevailing anti-introspectivist approach to mentality; to advance a substantive account of introspection; and to lay the groundwork for a more general theory about the mental. ;I begin by analyzing a host of philosophical problems about the mind; in each, I isolate the source of perplexity in an epistemic factor. The body of the thesis is devoted to elucidating the ontological and epistemological status of mind by considering, in turn, phenomenality and intentionality. ;Physicalism lacks the resources to explain the individual subject's greater epistemic authority regarding the phenomenal as compared to the physical. My detailed account of phenomenal state introspection is therefore preferable to the physicalist explanations of phenomenal knowledge; its consequences include a counterexample to a widely-accepted constraint on concept possession and a minor modification to one familiar theory of de se reference. ;Similarly, functionalist reduction of intentional states cannot countenance our refusal to defer to empirical science regarding one's occurrent mental states to the same extent that we defer regarding physical states. My account of introspection, which does justice to the measure of authority we retain about our own intentional states, undermines both functionalism and content externalism about such states. ;Grave difficulties face each of the four currently popular views about the relation between phenomenality and intentionality. According to my alternative, occurrent phenomenal states and occurrent intentional states are importantly different yet share an epistemic feature which distinguishes them from physical states: our deference to empirical science regarding such occurrent states is limited in a way that our deference regarding physical states is not. The key to understanding the mind is thus intimately related to the primary source of philosophical problems about it, namely, the disparity between our knowledge of the mental and our knowledge of the physical

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.