Online research in philosophy

Dretske’s Naturalizing the Mind sets out the case for holding that mental states in general are natural representers of reality. Mental states have functions; for many states the function is to indicate what is going on in the world. Among such indicator states are beliefs. The content of these states is given by what they are supposed to represent. So if a state is supposed to indicate that it’s dark, then “it’s dark” is the content of the state. Thus we can characterize how the organism takes things to be, its subjectivity, by noting first what physical (neural) state it is in, and second what the biological indicator function of that state is. Thus the mind and meaning are naturalized.

In the mid-nineties, Fred Dretske, William Lycan and Michael Tye published books defending an ambitious new reductive program. The program came in two stages. The first was to defend Intentionalism. The second was to reduce the secondary qualities to external physical properties and then to explain sensory representation in terms of tracking under optimal conditions or biological function. The old reductive program was internalist: the idea used to be that we could reduce experiences to brain states. The new reductive program is externalist.

This thesis is an examination and critique of naturalistic representational theories of phenomenal character. Phenomenal character refers to the distinctive quality that perceptual and sensational experiences seem to have; it is identified with 'what it is like' to undergo experiences. The central claims of representationalism are that phenomenal character is identical with the content of experience and that all representational states, bearing appropriate relations to the cognitive system, are conscious experiences. These claims are taken to explain both how conscious experiential states arise and their nature. After examining the desiderata for naturalistic explanations, I argue that theories which ascribe nonconceptual content to experiences are the most plausible versions of representationalism. Further, causal covariation and teleological theories yield distinctive and interesting representationalist positions, hence, they become the focus of this study. To assess representationalism, I investigate whether all differences in phenomenal character can be correlated with differences in content. I claim that a useful distinction can be drawn between implicit and explicit content, which allows one to best describe the phenomena of perfect and relative pitch. I then argue that ambiguous figures show that two experiences can have the same content but different phenomenal character. I explicate the Inverted Earth hypothesis and claim that to identify content and phenomenal character, representationalists either have to condone the possibility of philosophical zombies, or hold that people lack authoritative first-person knowledge of their current experiences. Both these positions are unpalatable. Finally, I argue that representationalists cannot ascribe contents to experiences of novel colours to account for their phenomenal character. I also question, in light of dissociation phenomena, whether there is one distinctive relationship that all experiences bear to the cognitive system. I conclude that phenomenal character cannot be identical with the type of content under investigation, and that naturalistic representationalist theories cannot fully explain conscious experience.

Consider the conscious states of a single subject at a time. Arguably, split-brain cases show that such states need not be jointly accessible. It is less clear that these cases also show that such states need not be jointly experienced. Michael Tye (2004) argues split-brain cases do have that implication, and Timothy Bayne and David Chalmers (2003) argue that they do not. I will develop two objections to Tye’s arguments. First, an analogy to blindsight on which he relies is questionable. Second, even if his analogy succeeds, it shows only that a single person can simultaneously have two separate sets of phenomenally conscious mental states. That result fails to undermine the phenomenalunity thesis that Bayne and Chalmers defend, on which phenomenal consciousness is necessarily unified.

Perceptual experiences inform us about objective properties of things in our environment. But they also have perspectival character in the sense that they differ phenomenally when objects are viewed from different points of view. Contemporary representationalists hold, at a minimum, that phenomenal character supervenes on representational content. Thus, in order to account for perspectival character, they need to indentify a type of representational content that changes in appropriate ways with the perceiver’s point of view. Many representationlists, including Shoemaker and Lycan, argue that such contents are best construed in terms of mind-dependent properties. Other representationalists, including Tye and Dretske, hold that these contents involve only mind-independent properties. Susanna Schellenberg has recently developed an account of perceptual experience that would serve these latter representationalists extremely well. She suggests that we can do justice to the perspectival character of perceptual experience by appeal to representations of a certain type of relational properties, so-called ‘situation-dependent properties.’ In this paper, I critically engage with Schellenberg’s proposal in order to show how mind-independent representationalists can explain perspectival character. I argue that appeal to situation-dependent properties is problematic. I then show that mind-independent representationalists can account for perspectical character by means of scenario contents in Christopher Peacocke’s sense.

Michael Tye has recently argued that the phenomenal character of conscious experiences is "one and the same as" (1) Poised (2) Abstract (3) Non-conceptual (4) Intentional Content (PANIC). Tye argues extensively that PANIC Theory accounts for differences in phenomenal character in representational terms. But another task of a theory of phenomenal consciousness is to account for the difference between those mental states that have phenomenal character at all and those that do not. By going through each of the four qualifiers of PANIC, we argue that PANIC Theory fails to account for this difference in genuinely representational terms. We suggest, furthermore, that the reasons it fails are likely to be endemic to all representational theories of phenomenal consciousness.

Fred Dretske asserts that the conscious or phenomenal experiences associated with our perceptual states—e.g. the qualitative or subjective features involved in visual or auditory states—are identical to properties that things have according to our representations of them. This is Dretske's version of the currently popular representational theory of consciousness . After explicating the core of Dretske's representational thesis, I offer two criticisms. I suggest that Dretske's view fails to apply to a broad range of mental phenomena that have rather distinctive subjective or qualitative features. I also suggest that Dretske's view, in identifying conscious experiences with features of our perceptual states, casts its aim too low. It deflates further than it should and, in consequence, fails to capture what are arguably some of the most important phenomena associated with our conscious lives.

One-level accounts of consciousness have become increasingly popular (Dretske 1995, Tye 1995, Siewert 1998, Thomasson 2000 and 2005, Lurz 2006, McGinn, this volume). By a ‘onelevel’ account I mean an account according to which consciousness is fundamentally a matter of awareness of a world —and does not require awareness of our own minds, mental states, or the phenomenal character of these. As Fred Dretske puts it “Experiences and beliefs are conscious, not because you are conscious of them, but because, so to speak, you are conscious with them”.

The first problem concerns the famous Swampman who comes into existence as a result of a cosmic accident in which particles from the swamp come together, forming a molecular duplicate of a typical human. Reasonable people can disagree on whether Swampman has intentional contents. Suppose that Swampman marries Swampwoman and they have children. Reasonable people will be inclined to agree that there is something it is like for Swampchild when "words" go through his mind or come out of his mouth. Fred Dretske (1995) claims that if the materialist is to have any theory of intentional content at all, he has no option other than denying it. He is committed to the view that since phenomenal character is a kind of representational content that derives from evolution, the swampchildren have no phenomenal character. Zombiehood is hereditary. (So long as there is no evolution.) If your grandparents are all swamp-people, you are a zombie.