Eliminativism about Qualia

In view of the excellent arguments that have been put forth recently in favour of qualia, internal sensory presentations, it would strike an impartial observer - one could imagine a future historian of philosophy - as extremely odd why so many philosophers who are opposed to qualia, that is, sensory experiences internal to the brain, have largely ignored those arguments in their own. There has been a fashionable assumption that any theory of perception which espouses qualia has long since been (...) overcome by a number of 'formidable' objections, in particular, the Homunculus/Infinite Regress Objection, the Solipsism Objection, Austin's Illusion/Delusion Objection, the Ludicrousness-of-Colours-in-the-Brain Objection, the Indirect-Realist-has-to-assume-Direct-Realism Objection, the Impossibility-of-Comparing-Internal-with-External Objection, the Impossibility of Intrinsic Experience, and several more minor varieties of these. It is uncanny how they continue to be repeated, indeed, with a kind of automatism, evidenced by the fact that none of those who repeat them appear to have taken note of the answers to the objections. Indeed, they only appear to refer to those philosophers with whom they agree: it has long been insisted upon in the study of rhetoric that one of the weakest things to do in an argument is to ignore the main points made by one's opponent: [it is] the wisest plan _to state Objections in their full force_ ; at least, wherever there does exist a satisfactory answer to them; otherwise, those who hear them stated more strongly than by the uncandid advocate who had undertaken to repel them, will naturally enough conclude that they are unanswerable. It is but a momentary and ineffective triumph that can be obtained by man. (shrink)

Not so long ago, people had a very different concept of the mind and human nature. Our European heritage is a vision of the body as our mortal coil which we feel and command with our soul. The soul was thought to be immortal and exempt from the laws of nature so that our actions are not determined by anything outside of the boundaries of the soul. Souls of all sorts, of angels and spirits in addition to humans, permeated the (...) universe. The universe was an ordered cosmos with human beings at the center of it with a very special role to play in it. It was commonly held that only the soul can truly exhibit creativity and intelligence which no mere mechanism could replicate. Dreams and visions were considered important messengers. All this is quite intuitive; and its remnants are probably deeply ingrained in the everyday manner in which we still think about ourselves. -/- There is not much about the premodern conception that has survived these changes, except the view that we are conscious beings, i.e., that there is, in Thomas Nagel’s expression, something it is like to be us. Illusionists deny that there consciousness is real; this strange view is spreading from the halls of academia to popular media. I investigate the causes and consequences of this latest development in our conception of the mind. (shrink)

With its strategic consideration of phenomenal consciousness illusorily seeming to us, illusionism claims to deny phenomenality and thereby obviate the hard problem of consciousness. The problem with illusionism, however, is that, although its thesis appears persuasively simple, it strikes as absurd insofar as the phenomenal illusions themselves also seem as much as phenomenality, keeping no fundamental differences between the two. In short, it reinforces the same phenomenon/issue, i.e., phenomenality, that it claims to deny/avoid. This single absurdity is reflective of its (...) self-refuting nature, and it alone is enough for a rejection of illusionism. However, does illusionism have any reasonable justification to defend itself in the face of the experientially undeniable reality of phenomenal consciousness? This paper attempts to find out if there is any such illusionist justification. (shrink)

Illusionists about consciousness boldly argue that phenomenal consciousness does not fundamentally exist — it only seems to exist. For them, the impression of having a private inner life of conscious qualia is nothing more than a cognitive error, a conjuring trick put on by a purely physical brain. Some phenomenal realists have accused illusionism of being a byproduct of modern Western scientism and overzealous naturalism. However, Jay Garfield has endorsed illusionism by explicitly drawing support from the classical Yogācāra Buddhist philosopher (...) Vasubandhu. In this paper, I assess the degree to which Garfield’s illusionist interpretation accurately captures the views of Vasubandhu and his commentator Sthiramati in their extant Sanskrit works. As it turns out, Vasubandhu and Sthiramati converge with contemporary illusionists in taking an unconscious causal basis of cognitive/linguistic processes to be responsible for generating the illusion of representational states with apparently phenomenal contents. Within their constitutive understanding of the mind as the “imagination of what is non-existent” (abhūtaparikalpa), I raise possible candidates for what might seem to be real instances of phenomenality — mental appearances (pratibhāsa), affective sensory experience (vedanā), and “intrinsic luminosity” (prakṛtiprabhāsvara) — and consider possible responses on behalf of an illusionist interpreter. I conclude that Vasubandhu and Sthiramati really do appear to be strong illusionists about phenomenal consciousness, particularly if phenomenal states are assumed to be essentially representational. (shrink)

It is common to characterise phenomenal consciousness as _what it is like_ to be in a mental state. This paper argues that the ‘what-it’s-like’-phrase in this context has a technical meaning, i.e. a meaning for which the association to the relevant expression is peculiar to a theoretical community. The relevant theoretical community is philosophy and some parts of cognitive science, so on this view, only philosophers and cognitive scientists use the ‘what-it’s-like’-phrase in the way that is characteristic in the literature (...) on phenomenal consciousness. This claim has important consequences. Firstly, I argue that the phrase says nothing informative about phenomenal consciousness. Secondly, I argue that the fact that non-philosophers use the phrase is not compelling evidence that they believe in phenomenal consciousness. These claims have further consequences for debates about phenomenal consciousness. (shrink)

The study of color expanded rapidly in the 20th century. With this expansion came fragmentation, as philosophers, physicists, physiologists, psychologists, and others explored the subject in vastly different ways. There are at least two ways in which the study of color became contentious. The first was with regard to the definitional question: what is color? The second was with the location question: are colors inside the head or out in the world? In this chapter, we summarize the most prominent answers (...) that color scientists and philosophers gave to the definitional and location questions in the 20th century. We identify some of the different points at which their work intersected, as well as the most prominent schisms between them. One overarching theme of the chapter is the surprising proliferation of different views on color. Whereas some assume that progress in science must take the form of convergence, the 20th century history of color exhibited a marked divergence in views. This chapter leaves it an open question whether an ultimate unification of views is possible, or whether the only thing that ties together the study of “color” is the shared inheritance of a word. (shrink)

In this paper, we describe four broad ‘meta-methods’ employed in scientific and philosophical research of qualia. These are the theory-centred metamethod, the property-centred meta-method, the argument-centred meta-method, and the event-centred meta-method. Broadly speaking, the theory-centred meta-method is interested in the role of qualia as some theoretical entities picked out by our folk psychological theories; the property-centred meta-method is interested in some metaphysical properties of qualia that we immediately observe through introspection ; the argument-centred meta-method is interested in the role of (...) qualia in some arguments for non-physicalism; the event-centred metamethod is interested in the role of qualia as some natural events whose nature is hidden and must be uncovered empirically. We will argue that the event-centred metamethod is the most promising route to a comprehensive scientific conception of qualia because of the flexibility of ontological and methodological assumptions it can provide. We also reveal the hidden influences of the different meta-methods and in doing so show why consideration of meta-methods has value for the study of consciousness. (shrink)

Illusionists about phenomenal consciousness claim that phenomenal consciousness does not exist but merely seems to exist. At the same time, it is quite intuitive for there to be some kind of link between phenomenality and value. For example, some situations seem good or bad in virtue of the conscious experiences they feature. Illusionist views of phenomenal consciousness then face what I call the normative challenge. They have to say where they stand regarding the idea that there is a link between (...) phenomenality and value. If they accept that there is such a link, they might be committed to revisionary normative consequences (and some of them may prove to be uncomfortable). If they deny that there is such link, they might avoid revisionary normative consequences (without being guaranteed against them) but then they have to give reasons to deny that such link obtains, which is not a trivial task. The existence of the normative challenge does not show that illusionism is false, but it shows that illusionism might have important consequences in the normative domain, which have to be clarified. (shrink)

Some friends of eliminativism about ordinary material objects such as tables or statues think that we need to make exceptions. In this article, I am interested in Trenton Merricks’ claim that we need to make an exception for us, conscious beings, and that we are something over and above simples arranged in suitable ways, unlike tables or statues. I resist this need for making an exception, using the resources of four-dimensionalism.

[Précis of What It’s Like, or What It’s About? The Place of Consciousness in the Material World] The paper provides a summary of my recent Czech-language book, WHAT IT'S LIKE, OR WHAT IT'S ABOUT? THE PLACE OF CONSCIOUSNESS IN THE MATERIAL WORLD (2017). As suggested by the subtitle, the topic of the book is philosophy of consciousness. In the contemporary literature, most participants have in mind the so-called phenomenal characters, and the main issue debated between dualists and materialists is whether (...) these characters are material properties. Even the Russellian monists, who otherwise present themselves as an alternative to both dualism and materialism, accept the concept of phenomenal character. I express doubts about this concept in chapter six of my book; accordingly, I allot most space in the paper to the material from this chapter. Despite the majority opinion, I believe that no agreement has in fact been reached concerning the content of this concept. Similarly to Daniel Dennett, I recommend trying to develop a philosophy of consciousness without the concept of phenomenal character. As is well known, Dennett – to some extent similarly to the aforementioned materialists – proposes a reduction of consciousness in terms of representation. However, I wound up rather more skeptical than Dennett, since following up on my previous book, THE METAPHYSICS OF ANTI-INDIVIDUALISMU (2008), I claim that a naturalistic theory of representation is incoherent. (shrink)

[Replies to My Friends] This is an answer to the critics of my book WHAT IT'S LIKE, OR WHAT IT'S ABOUT? THE PLACE OF CONSCIOUSNESS IN THE MATERIAL WORLD (2017). I proceed from the least to the most serious objections. I start with Jakub Mihálik’s defense of Russellian Monism against my claim that it is not a genuine alternative to standard dualism and materialism. In reply, I claim this is a side issue to the central aim of my book, which (...) is to undermine the concept of phenomenal consciousness assumed by Russellian Monism as much as by every other standard theory. One of these standard theories is reductive materialism, pursued by Michal Polák and Tomáš Marvan. Both Polák and Marvan are worried by Dennett’s alleged eliminativism, even though their arguments somewhat differ. Polák believes in a deflationary concept of consciousness, which I am afraid lacks a definite content. Marvan offers an “innocent” concept of consciousness, on which there is supposed to be a general consensus, but I think he just assumes that the concept of phenomenal property is part of the definition of consciousness. Curiously, while Polák and Marvan take me as to be a Dennettian, Stefanie Dach argues that I misinterpret Dennett. Conversely, I believe that she overlooks weak points in Dennett’s theory. (shrink)

In this chapter I argue that despite its current popularity the doctrine of the specious present, or at least every current version of it, should be rejected. I describe two alternative accounts, which deal with experiences of two different kinds of change. The first is what I call the dynamic snapshot theory, which accounts for the way we experience continuous changes such as motion and other motion-like phenomena. The second account deals with the way we experience discontinuous changes, those for (...) which there is no finite rate of change. However I then argue that much of the current debate implicitly presupposes a problematic Cartesian view about the nature of conscious experience. If this view is rejected – as I think it should be – then a different kind of account emerges that avoids commitment both to the specious present and to its main current rival, the cinematic view. (shrink)

Illusionism about phenomenal properties has the potential to leave us with all the benefit of taking consciousness seriously and far fewer problems than those accompanying phenomenal realism. The particular problem I explore here is an epistemological puzzle that leaves the phenomenal realist with a dilemma but causes no trouble for the illusionist: how can we account for false beliefs about our own phenomenal properties? If realism is true, facts about our phenomenal properties must hold independent of our beliefs about those (...) properties, so mistaken phenomenal beliefs must always remain an open possibility. But there is no way to identify the phenomenal facts that make these beliefs false other than by mere stipulation. If illusionism is true, then the state of affairs regarding what a subject's experience seems like is just the illusion itself; there are no further facts of the matter about which the subject might have mistaken beliefs, so the problem does not arise. (shrink)

ABSTRACT. Thought experiments about de se attitudes and Jackson’s original Knowledge Argument are compared with each other and discussed from the perspective of a computational theory of mind. It is argued that internal knowledge, i.e. knowledge formed on the basis of signals that encode aspects of their own processing rather than being intentionally directed towards external objects, suffices for explaining the seminal puzzles without resorting to acquaintance or phenomenal character as primitive notions. Since computationalism is ontologically neutral, the account also (...) explains why neither Lewis’s two gods nor Mary’s surprise in the Knowledge Argument violate physicalism. (shrink)

The systematic phenomenology-denial within the works of Paul and Patricia Churchland is critiqued as to its coherence with the known elelmentary physics and physiology of perception. Paul Churchland misidentifies "qualia" with psychology's sensorimotor schemas, while Patricia Churchland illicitly propounds the intertheoretic identities of logical empiricism while rejecting the premises upon which those identities are based. Their analogies from such arguments to an identity of mind and brain thus have no inductive probability.

Philosophical and scientific defenses of Indirect Realism and counterarguments to the attacks of qualiaphobes.

Can the physicalist consistently hold that representational content is all there is to sensory experience and yet that two perceivers could have inverted phenomenal spectra? Yes, if he holds that the phenomenal properties the inverts experience are dummy properties, not instantiated in the physical objects being perceived nor in the perceivers.

The phenomenal character of an experience is what it is like subjectively to undergo the experience. Experiences vary in their phenomenal character, in what it is like to un- dergo them. Think, for example of the subjective differences between feeling a burning pain in a toe, experiencing an itch in an arm, smelling rotten eggs, tasting Marmite, having a visual experience of bright purple, running one’s fingers over rough sandpaper, feeling hungry, experiencing anger, feeling elated. Insofar as what it is (...) like to undergo each of these experiences is different, their phenomenal character is different. (shrink)

Dualists believe that experiences have neither location nor extension, while reductive and ‘non-reductive’ physicalists (biological naturalists) believe that experiences are really in the brain, producing an apparent impasse in current theories of mind. Enactive and reflexive models of perception try to resolve this impasse with a form of “externalism” that challenges the assumption that experiences must either be nowhere or in the brain. However, they are externalist in very different ways. Insofar as they locate experiences anywhere, enactive models locate conscious (...) phenomenology in the dynamic interaction of organisms with the external world, and in some versions, they reduce conscious phenomenology to such interactions, in the hope that this will resolve the hard problem of consciousness. The reflexive model accepts that experiences of the world result from dynamic organism–environment interactions, but argues that such interactions are preconscious. While the resulting phenomenal world is a consequence of such interactions, it cannot be reduced to them. The reflexive model is externalist in its claim that this external phenomenal world, which we normally think of as the “physical world,” is literally outside the brain. Furthermore, there are no added conscious experiences of the external world inside the brain. In the present paper I present the case for the enactive and reflexive alternatives to more classical views and evaluate their consequences. I argue that, in closing the gap between the phenomenal world and what we normally think of as the physical world, the reflexive model resolves one facet of the hard problem of consciousness. Conversely, while enactive models have useful things to say about percept formation and representation, they fail to address the hard problem of consciousness. (shrink)

This paper critiques the representationalist account of qualia, focussing on the Representational Naturalism presented by Fred Dretske in Naturalizing the Mind. After laying out Dretskes theory of qualia and making clear its externalist consequences, I argue that Dretskes definition is either too liberal or runs into problems defending its requirements, in particular naturalness and mentalness. I go on to show that Dretskes account of qualia falls foul of the argument from misperception in such a way that Dretske must either admit (...) that his kind of qualia have nothing at all to do with what mental life subjectively feels like, or that veridical perception involves qualia and misperception does not. (shrink)

Max Bennett is a distinguished Australian neuroscientist, Peter Hacker an Oxford philosopher and leading authority on Wittgenstein. A book resulting from their collaboration, Philosophical Foundations of Neuroscience, has received high praise. According to the Blackwell website, G.H. von Wright asserts that it 'will certainly, for a long time to come, be the most important contribution to the mind-body problem that there is'; and Sir Anthony Kenny says it 'shows that the claims made on behalf of cognitive science are ill-founded'. M.R. (...) Bennett & P.M.S. Hacker, Philosophical Foundations of Neuroscience. (shrink)

In his 1991 book ‘Consciousness Explained', Daniel Dennett presents his “Multiple Drafts” model of consciousness. Central to his theory is the rejection of the notion of ‘qualia'; of the existence of the purported ‘qualitative character' of conscious experience that many argue rules out the possibility of a purely materialist theory of mind. In eliminating qualia from his theory of consciousness, Dennett claims to be following in the footsteps of Wittgenstein, who also had much to say regarding the nature of ‘private' (...) experience. In this paper I reject this claim and argue that the elimination of qualia plays no part in Wittgenstein's radical understanding of conscious experience. S. Afr. J. Philos. Vol.24(1) 2005: 33-43. (shrink)

Dennett provides a much discussed argument for the nonexistence of qualia, as conceived by philosophers like Block, Chalmers, Loar and Searle. My goal in this paper is to vindicate Dennett's argument, construed in a certain way. The argument supports the claim that qualia are constitutively representational. Against Block and Chalmers, the argument rejects the detachment of phenomenal from information-processing consciousness; and against Loar and Searle, it defends the claim that qualia are constitutively representational in an externalist understanding of this. The (...) core of the argument is contained in section 3. In the first part, I contrast a minimal conception of qualia, relative to which their existence is not under dispute, with the sort of view to which I will object. In the second part I set the stage by presenting the facts about qualia on which a Dennett-like argument can be based. (shrink)

Experiences vary widely. For example, I run my fingers over sandpaper, smell a skunk, feel a sharp pain in my finger, seem to see bright purple, become extremely angry. In each of these cases, I am the subject of a mental state with a very distinctive subjective character. There is something it is _like_ for me to undergo each state, some phenomenology that it has. Philoso- phers often use the term 'qualia' to refer to the introspectively accessible properties of experiences (...) that characterize what it is like to have them. In this standard, broad sense of the term, it is very difficult to deny that there are qualia. There is another, more restricted use of the term. (shrink)

I argue that, contrary to widespread philosophical opinion, phenomenal indiscriminability is transitive. For if it were not transitive, we would be precluded from accepting the truisms that if two things look the same then the way they look is the same and that if two things look the same then if one looks red, so does the other. Nevertheless, it has seemed obvious to many philosophers (e.g. Goodman, Armstrong and Dummett) that phenomenal indiscriminability is not transitive; and, moreover, that this (...) non-transitivity is straightforwardly revealed to us in experience. I show this thought to be wrong. All inferences from the character of our experience to the non-transitivity of indiscriminability involve either a misunderstanding of continuity, a mistaken interpretation of the idea that we have limited powers of discrimination, or tendentious claims about what our experience is really like; or such inferences are based on inadequately supported premisses, which though individually plausible are jointly implausible. (shrink)

Philosophical Studies 104: 143-162 (2001).

If we are to preserve qualia, one possibility is to take the current academic, philosophical, and theoretical notion less seriously and current natural science and some pre-theoretical intuitions about qualia more seriously. Dennett (1997) is instrumental in showing how ideas of the intrinsicalness and privacy of qualia are misguided and those of ineffability and immediacy misinterpreted. However, by combining ideas of non-mechanicalness used in contemporary natural science with the pre-theoretical idea that qualia are special because they are unique, we get (...) a notion of qualia that is acceptable to naturalistic philosophy. The notion of unique qualia is not opposed to the idea that some of the characterizations of qualia have to be qualified. It is the folk-philosophical, academic, notions of theoreticity and conceptuality that have to be modified. (shrink)

Dennett has maintained that a careful examination of our intuitive notion of qualia reveals that it is a confused notion, that it is advisable to accept that experience does not have the properties designated by it and that it is best to eliminate it. Because most scientists share this notion of qualia, the major line of attack of his project becomes that of raising objections against the ability of science to answer some basic questions about qualia. I try to show (...) that science appeals to qualia and that it in fact adheres to a notion of qualia different from the one that Dennett has attributed to it. It is argued that qualia are amenable to scientific investigation and that this is the reason why science contributes toward the clarification of the notion of qualia. I also try to show that Dennett's skepticism about the abilities of science in answering questions posited by one of his thought experiments is unwarranted. I conclude that we need not accept Dennett's eliminativism about qualia. (shrink)

The subjective features of conscious mental processes--as opposed to their physical causes and effects--cannot be captured by the purified form of thought suitable for dealing with the physical world that underlies appearances.".

This essay is a defence of the traditional notion of qualia - as properties of consciousness that are ineffable, intrinsic, private and immediately apprehensible - against the eliminative attempts of Daniel Dennett in the influential article "Quining Qualia." It is suggested that a thorough exploration of the concept is an appropriate starting point for future explanations of qualia, and the essay ends with some possible explanations of the four traditional properties.

This book is about experiential content: what it is; what kind of account can be given of it. I am concerned with identifying and attacking one main view - I call it the inferentialist proposal. This account is central to the philosophy of mind, epistemology and philosophy of science and perception. I claim, however, that it needs to be recast into something far more subtle and enriched, and I attempt to provide a better alternative in these pages. The inferentialist proposal (...) holds that experiential content is necessarily under¬pinned by sophisticated cognitive influences. My alternative, the continuum theory, holds that these influences are relevant to experience only at certain levels of organisation and that at other levels there are contents which such features do not capture at all. Central to my account is that there are degrees to which cognitive influences affect experiential content; indeed, for the most part, experience is an amalgam of both inferential and non-inferential features. I claim that the inferentialist proposal is fundamentally flawed and deserves replacement, and I argue that my alternative fills the hollow that remains. The book is divided into four sections. In Part I, Chapter 1, I introduce two traditionally rival views of experiential content. In Chapter 2, I develop my continuum alternative. Chapter 3 assesses the relationship between experience and language, while Chapter 4 explores the relationship between beliefs and experience. The overall argument is that it has been a mistake to understand experience simply in inferential or non-inferential terms. In Part II, I examine the structure of mental content. Chapter 5 is concerned with the kinds of experiences which escape the inferentialist analysis. Chapter 6 considers Kant’s metaphysic of experience counterpointed to Lorenz’s reading of his work in the light of evolutionary biology. Chapter 7 treats animal experience in relation to the continuum view I am developing, while Chapter 8 reviews Fodor’s contribution to perceptual psychology. It is argued that the view of experiential content being developed is both consistent with empirical data on informationally local perceptual sub-systems, but also accords well with evolutionary theory and a naturalist interpretation of Kant’s taxonomy. Part III deals with inferentialism in the philosophy of science. In Chapter 9, I assess the theory dependence of observation thesis as it is advanced by Paul Feyerabend. I bring out of his account a subtle confusion concerning the importance of inference in the context of scientific inquiry. Part IV deals with the issue of experience in the philosophy of mind. In Chapter 10, I look at Wilfred Sellars’s attack on sense data theories. Chapter 11 confronts Paul Churchland’s treatment of ‘folk psychology’ while Chapter 12 isolates the issue of experiential qualia and the position of property dualism. I offer a critical review of Thomas Nagel’s work in this chapter and claim that his position can be read in a way which is consistent with the continuum account I am developing. I conclude the book in the usual fashion with a summary of the central claims. (shrink)

In this paper I present two arguments against the thesis that we experience qualia. I argue that if we experienced qualia then these qualia would have to be essentially vague entities. And I then offer two arguments, one a reworking of Gareth Evans' argument against the possibility of vague objects, the other a reworking of the Sorites argument, to show that no such essentially vague entities can exist. I consider various objections but argue that ultimately they all fail. In particular (...) I claim that the stock responses to the Sorites argument fail against my reworking of the argument because they require us to make a distinction between a determinate reality and how that reality appears to us, whereas in the case of qualia we can make no such distinction. I conclude that there can be no such things as qualia. (shrink)

Thanks largely to Daniel Dennett, I am a recent convert to what many will regard as the shocking hypothesis that qualia do not exist. This admission is not quite a confident sighting of that rarest of philosophical birds, an unequivocally sound and valid argument. For one thing, I have, like many, been frustrated by and suspicious of philosophers' use of qualia for some time, and have often wished them dead ; so I was an easy mark. More to the point, (...) I was persuaded by Dennett without being persuaded by his arguments. This is not intended as a confession of a Kirkegaardian penchant for preferring to believe the conclusions of bad arguments. Dennett enabled me finally to kick qualia out of my private ontology by providing, in the later sections of his “Quining Qualia”, an alternative conceptual vocabulary for talking about the contents of perceptual and reflective experience that genuinely makes no appeal, surreptitious or otherwise, to qualia. Furthermore, Dennett's most general motivations for banishing qualia—the convictions that there is no compelling evidence for them, that they serve no reliable explanatory purpose and that the hypothesis of their non-existence dissolves some otherwise wrenching philosophical dilemmas—are the right ones, and his paper made this clear to me. However, I feel the need to quine qualia again for myself, because I want them to stay dead, and am afraid that, due to some infelicities in his argument, Dennett has only wounded them. (shrink)

A family of compelling intuitions work to keep "the problem of consciousness" systematically insoluble, and David Rosenthal, in a series of papers including the one under discussion, has been resolutely driving these intuitions apart, exposing them individually to the light, and proposing alternatives. In this instance the intuition that has seemed sacrosanct, but falls to his analysis, is the intuition that "sensory quality" and consciousness are necessarily united: that, for instance, there could not be unconscious pains, or unconscious subjective shades (...) of blue, or unconscious aromas of freshly roasted coffee beans. The particular airborne polymers that are the vehicles of freshly roasted coffee beans could exist, of course, in the absence of any observer, and hence of any consciousness, but the sensory quality of that aroma requires--according to well-entrenched intuition--not only an observer but a conscious observer. Such properties have no esse except as percipi. (shrink)

A Neurocomputationial Perspective illustrates the fertility of the concepts and data drawn from the study of the brain and of artificial networks that model the...