The knowledge argument is something that is both an ideal for philosophy and yet surprisingly rare: a simple, valid argument for an interesting and important conclusion, with plausible premises. From a compelling thought-experiment and a few apparently innocuous assumptions, the argument seems to give us the conclusion, a priori, that physicalism is false. Given the apparent power of this apparently simple argument, it is not surprising that philosophers have worried over the argument and its (...) proper diagnosis: physicalists have disputed its validity, or soundness or both; in response, non-physicalists have attempted to reformulate the argument to show its real anti-physicalist lesson. (shrink)

Few these days dispute that the knowledge argument demonstrates an epistemic gap between the physical facts and the facts about experience. It is much more contentious whether that epistemic gap can be used to demonstrate a metaphysical gap of a kind that is inconsistent with physicalism. In this paper I will explore two attempts to block the inference from an epistemic gap to a metaphysical gap – the first from the phenomenal concept strategy, the second from Russellian monism (...) – and suggest how the proponent of the knowledge argument might respond to each of these challenges. In doing so, I will draw on recent discussions of grounding and essence in the metaphysics literature. (shrink)

Phenomenal knowledge is knowledge of what it is like to be in conscious states, such as seeing red or being in pain. According to the knowledge argument (Jackson 1982, 1986), phenomenal knowledge is knowledge that, i.e., knowledge of phenomenal facts. According to the ability hypothesis (Nemirow 1979; Lewis 1983), phenomenal knowledge is mere practical knowledge how, i.e., the mere possession of abilities. However, some phenomenal knowledge also seems to be (...) class='Hi'>knowledge why, i.e., knowledge of explanatory facts. For example, someone who has just experienced pain for the first time learns not only that this is what pain is like, but also why people tend to avoid it. -/- Some philosophers have claimed that experiencing pain gives knowledge why in a normative sense: it tells us why pain is bad and why inflicting it is wrong (Kahane 2010). But phenomenal knowledge seems to explain not (only) why people should avoid pain, but why they in fact tend to do so. In this paper, I will explicate and defend a precise version of this claim and use it as a basis for a new version of the knowledge argument, which I call the explanatory knowledge argument. According to the argument, some phenomenal knowledge (1) explains regularities in a distinctive, ultimate or regress-ending way, and (2) predict them without induction. No physical knowledge explains and predicts regularities in the same way. This implies the existence of distinctive, phenomenal explanatory facts, which cannot be identified with physical facts. -/- I will show that this argument can be defended against the main objections to the original knowledge argument, the ability hypothesis and the phenomenal concept strategy, even if it turns out that the original cannot. In this way, the explanatory knowledge argument further strengthens the case against physicalism. (shrink)

According to Frank Jackson’s famous knowledge argument, Mary, a brilliant neuroscientist raised in a black and white room and bestowed with complete physical knowledge, cannot know certain truths about phenomenal experience. This claim about knowledge, in turn, implies that physicalism is false. I argue that the knowledge argument founders on a dilemma. Either (i) Mary cannot know the relevant experiential truths because of trivial obstacles that have no bearing on the truth of physicalism or (...) (ii) once the obstacles have been removed, Mary can know the relevant truths. If we give Mary the epistemological capabilities necessary to draw metaphysical conclusions about physicalism, she will, while trapped in the black and white room, be able to know every truth about phenomenal experience. (shrink)

Frank Jackson’s famous Knowledge Argument moves from the premise that complete physical knowledge about experiences is not complete knowledge about experiences to the falsity of physicalism. Some physicalists (e.g., John Perry) have countered by arguing that what Jackson’s Mary, the perfect scientist who acquires all physical knowledge about experiencing red while being locked in a monochromatic room, lacks before experiencing red is merely a piece of recognitional knowledge of an identity, and that since lacking (...) a piece of recognitional knowledge of an identity does not entail lacking any pieces of knowledge of worldly facts, physicalism is safe. I will argue that what Mary lacks in her room is not merely a piece of recognitional knowledge of an identity and that some physicalists have failed to see this because of a failure to appreciate that Mary’s epistemic progress when she first experiences red has two different stages. While the second epistemic stage can perhaps be plausibly considered as acquiring merely a piece of recognitional knowledge of an identity, there is good reason to think that the first epistemic stage cannot be thus considered. (shrink)

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. (shrink)

In this paper I present a new argument against internalist theories of practical reason. My argument is inpired by Frank Jackson's celebrated Knowledge Argument. I ask what will happen when an agent experiences pain for the first time. Such an agent, I argue, will gain new normative knowledge that internalism cannot explain. This argument presents a similar difficulty for other subjectivist and constructivist theories of practical reason and value. I end by suggesting that some (...) debates in meta-ethics and in the philosophy of mind might be more closely intertwined than philosophers in either area would like to believe. (shrink)

Several of the most compelling anti-materialist arguments are motivated by the supposed existence of an unbridgeable epistemic gap between first-person subjective knowledge about one’s own conscious experience and third-personally acquired knowledge. The two with which this paper is concerned are Frank Jackson’s ‘knowledge argument’ and David Chalmers’s ‘modal argument’. The knowledge argument and the modal argument are often taken to function as ‘two sides of the same coin … in principle each succeeds (...) on its own, but in practice they work best in tandem’. This paper disagrees with the above claim, and argues that when considered together the knowledge argument and modal arguments illuminate each other’s weaknesses. These weaknesses become apparent when we acknowledge the epistemic richness of the cognitive aspect of perceptual experience, and question the epistemic role that any non-cognitive aspect might play. Closer examination of judgments about what it’s like to have a perceptual experience reveals fundamental problems with the knowledge argument, and when these problems are exposed, the two arguments can no longer ‘buttress each other where help is needed’. It becomes clear that neither is likely to succeed on its own, and when taken together both are destabilized. (shrink)

The central attempt of this paper is to explain the underlying intuitions of Frank Jackson’s “Knowledge Argument” that the epistemic gap between phenomenal knowledge and physical knowledge points towards a corresponding ontological gap. The first step of my analysis is the claim that qualia are epistemically special because the acquisition of the phenomenal concept of a quale x requires the experience of x. Arguing what is so special about phenomenal concepts and pointing at the inherence-relation with (...) the qualia they pick out, I give compelling reasons for the existence of ontologically distinct entities. Finally I conclude that phenomenal knowledge is caused by phenomenal properties and the instantiation of these properties is a specific phenomenal fact, which can not be mediated by any form of descriptive information. So it will be shown that phenomenal knowledge must count as the possession of very special information necessarily couched in subjective, phenomenal conceptions. (shrink)

There is widespread debate in contemporary philosophy of mind over the place of conscious experiences in the natural world – where the latter is taken to be broadly as described and explained by such sciences as physics, chemistry and biology; while conscious experiences encompass pains, bodily sensations, perceptions, feelings and moods. Many philosophers and scientists, who endorse physicalism or materialism, maintain that these mental states can be completely described and explained in natural terms. Frank Jackson’s knowledge argument is (...) a very influential objection to physicalism and, thus, to such an optimistic view about the scientific treatability of conscious experiences. According to the knowledge argument, we can know facts about our colour experiences that are not physical facts. -/- At the heart of this book lies a response to the knowledge argument that aims to defend a version of physicalism, that the author calls modest reductionism. This reply is based on the endorsement of the phenomenal concept strategy. According to this response, the knowledge argument cannot prove that there are non-physical facts. Instead, it can only show that there are ways of thinking about colour experiences that are based on phenomenal concepts that differ from scientific concepts. The author argues for the superiority of the phenomenal concept strategy over other influential physicalist replies to the knowledge argument. However, he criticises some recent physicalist accounts of phenomenal concepts and develops his own distinctive theory of these concepts. -/- . (shrink)

The paper argues that Jackson's knowledge argument fails to undermine physicalist ontology. First, it is argued that, as this argument stands, it begs the question. Second, it is suggested that by supplementing the argument , this flaw can be remedied insofar as the argument is taken to be an argument against type-physicalism; however, this flaw cannot be remedied insofar as the argument is taken to be an argument against token-physicalism. The argument (...) cannot be supplemented so as to show that experiences have properties which are illegitimate from a physicalist perspective. (shrink)

Someone who knew everything about the world’s physical nature could, apparently, suffer from ignorance about various aspects of conscious experience. Someone who knew everything about the world’s physical and mental nature could, apparently, suffer from moral ignorance. Does it follow that there are ways the world is, over and above the way it is physically or psychophysically? This paper defends a negative answer, based on a distinction between knowing the fact that p and knowing that p. This distinction is made (...) intelligible by reference to criterial connections between the possession of moral or phenomenal knowledge, and the satisfaction of cognitively neutral conditions of desire and experiential history. The existence of such connections in the moral case makes for an efficient dissolution of the so-called moral problem. (shrink)

In this paper I argue that Frank Jackson.

Mary learns all the physical facts that one can learn by watching lectures on black-on-white television. According to Jackson, Mary learns new facts when she leaves the room and has color experiences, and that this undermines physicalism. Physicalists have responded by denying the new facts thesis; they argue, she acquires abilities, acquaintance knowledge, or new guises. I argue that the NFT is more plausible than any of the proposed alternatives. I also argue that the NFT does not undermine physicalism (...) unless physicalism entails that all physical facts are discursively learnable, and that the latter entailment is questionable. (shrink)

I defend Frank Jackson's knowledge argument against physicalism in the philosophy of mind from a criticism that has been advanced by Laurence Nemirow and David Lewis. According to their criticism, what Mary lacked when she was in her black and white room was a set of abilities; she did not know how to recognize or imagine certain types of experience from a first-person perspective. Her subsequent discovery of what it is like to experience redness amounts to no more (...) than her acquisition of these abilities. The physicalist can admit this, since it does not commit one to the view that there are any facts of which Mary was ignorant . I argue against this view, on the grounds that the knowledge of what an experience is like cannot be equated with the possession of any set of abilities. (shrink)

This paper calls into question the viability of materialist reduction of the phenomenal. I revisit the 'Knowledge Argument', which claims that there is information about the phenomenal which is not reducible to, nor even inferable from, information about the physical. I demonstrate the failure of the two chief strategies for blocking the Knowledge Argument: analyzing phenomenal knowledge as an ability, and construing it as knowledge of facts which are ontologically reducible to physical facts. Materialist (...) reduction of the phenomenal is, thus, untenable; materialists must adopt a more extreme, eliminativist view about the phenomenal. (shrink)

I argue that Frank Jackson's knowledge argument cannot succeed in showing that qualia are epiphenomenal. The reason for this is that there is, given the structure of the argument, an irreconcilable tension between his support for the claim that qualia are non-physical and his conclusion that they are epiphenomenal. The source of the tension is that his argument for the non-physical character of qualia is plausible only on the assumption that they have causal efficacy, while his (...) argument for the epiphenomenal character of qualia is plausible only on the assumption that they are non-physical. Since these two arguments cannot be combined coherently, the most Jackson's argument can establish is that qualia are non-physical. (shrink)

The article introduces two kinds of belief-phenomenal belief and nonphenomenal belief-about color experiences and examines under what conditions the distinction can be extended to belief about other kinds of mental states. A thesis of the paper is that the so-called Knowledge Argument should not be formulated-as usual-using the locution of `knowing what it's like' but instead using the concept of phenomenal belief and explains why `knowing what it's like' does not serve the purposes of those who wish to (...) defend the Knowledge Argument. The article distinguishes two rival accounts of the phenomenal/nonphenomenal distinction and explains how the result of the Knowledge Argument depends upon which of these accounts one wishes to accept. (shrink)

The article introduces two kinds of belief-phenomenal belief and nonphenomenal belief---about color experiences and examines under what conditions the distinction can be extended to belief about other kinds of mental states. A thesis of the paper is that the so-called Knowledge Argument should not be formulated---as usual---using the locution of ‘knowing what it’s like’ but instead using the concept of phenomenal belief and explains why ‘knowing what it's like’ does not serve the purposes of those who wish to (...) defend the Knowledge Argument. The article distinguishes two rival accounts of the phenomenal/nonphenomenal distinction and explains how the result of the Knowledge Argument depends upon which of these accounts one wishes to accept. (shrink)

The literature on the Knowledge Argument exhibits considerable confusion about the precise nature of the argument. I contend that a clarification of the essence of self-presenting properties provides an explanation of this confusion such that the confusion itself is evidence for dualism. I also claim that Mary gains six different sorts of knowledge after gaining sight, and I show how this claim provides a response to a physicalist undercutting defeater for the Knowledge Argument. I (...) try to show that this defeater is inadequate due to its failure to capture the epistemic richness of what happens to Mary. Finally, I indicate how my enriched version of the Knowledge Argument provides grounds for rejecting those varieties of physicalism that eschew a depiction of phenomenal propertiesas intrinsic attributes a subject exemplifies in favor of a view that treats them as functional roles a subject realizes. (shrink)

In this paper I discuss a variant of the knowledge argument which is based upon Frank Jackson's Mary thought experiment. Using this argument, Jackson tries to support the thesis that a purely physical – or, put generally: an objectively scientific – perspective upon the world excludes the important domain of `phenomenal' facts, which are only accessible introspectively. Martine Nida-Rümelinhas formulated the epistemological challenge behind the case of Mary especially clearly. I take her formulation of the problem as (...) a starting-point and present a solution which is based solely on the concepts of capability and of metalinguistic beliefs. References to epiphenomenal facts, phenomenal knowledge etc. will be avoided completely. I specify my proposal against the backdrop of Burge's critical reflections about metalinguistic reinterpretation of expressions of belief and the externalist thesis held by Burge, Putnam and others that meanings and mental states are dependent upon the environment. My solution is then compared with Lewis' and Nemirow's ability objection. Finally I argue that the much discussed ``knowing what it is like'' has in its ordinary meaning nothing much to do with `phenomenal knowledge' or knowledge of `epiphenomenal' facts. (shrink)

The paper discusses Crane’s analysis of Knowledge argument, and sets forth author’s disagreement with Crane. Surely Mary learns something new when she sees a color for the first time. The time for a physicalist to quarrel comes only when a qualia person says that this experience represents special phenomenal facts, and that such understanding should be identified with propositional knowledge. We should not confuse ‘having information’ with having the same information in the form of knowledge or (...) belief. Mary knows everything there is to know about color vision. The only thing she has not done is practically experience what it is like to see a color. Thus her knowledge gap is practical and not propositional. (shrink)

The knowledge argument aims to refute physicalism, the view that the world is entirely physical. The argument first establishes the existence of facts about consciousness that are not a priori deducible from the complete physical truth, and then infers the falsity of physicalism from this lack of deducibility. Frank Jackson gave the argument its classic formulation. But now he rejects the argument . On his view, it relies on a false conception of sensory experience, which (...) should be replaced with representationalism , the view that phenomenal states are just representational states. And he argues that mental representation is physically explicable. (shrink)

Frank Jackson endorses epiphenomenalism because he thinks that his knowledge argument undermines physicalism. One of the most interesting criticisms of Jackson's position is what I call the 'inconsistency objection'. The inconsistency objection says that Jackson's position is untenable because epiphenomenalism undermines the knowledge argument. The inconsistency objection has been defended by various philosophers independently, including Michael Watkins, Fredrik Stjernberg, and Neil Campbell. Surprisingly enough, while Jackson himself admits explicitly that the inconsistency objection is 'the most powerful (...) reply to the knowledge argument' he knows of, it has never been discussed critically. The aim of this paper is to evaluate the objection and to identify and consider its implications. The objection is alleged to be based on a causal theory of knowledte. I argue that the objection fails by showing that any causal theory of knowledge is such that it is either false or does not support the inconsistency objection. In order to defend my argument, I offer a hypothesis concerning phenomenal knowledge. (shrink)

*[[This paper is largely based on material in other papers. The first three sections and the appendix are drawn with minor modifications from Chalmers 2002c . The main ideas of the last three sections are drawn from Chalmers 1996, 1999, and 2002a, although with considerable revision and elaboration. ]].

In a now famous thought experiment, Frank jackson asked us t0 imagine an omniscient scientist, Mary, who is coniincd in a black-and-white room and then released into the world 0f color . Assuming that she is omniscicnt in respect of all physical facts—roughiy, all the facts available to physics and all the facts that they in turn Hx or determine-physicalism would suggest that there is no new fact Mary can discover after emancipation; physicalism holds that all facts are physical in (...) the relevant sense . Yet we cannot help but feel that coming out of that room would be an occasion of dramatic enlightenment and, in particular, an occasion for learning facts to do with how red or yellow or blue 100ks or, as it is usually said, with what it is like t0 sec red or yellow or blue. Many in the black-and—whit<—: room knew all the physical facts about the world, where these may be taken to include three sorts of color facts: objcctual facts, as to what surface colors different objects have, assuming as I shall do throughout—that colors are properties of objects; intentional facts, as to which colors different objects 0r apparent objects are represented as having in the subjc-:ct’s experience, rightly or wrongly; and nonintentional facts, about what such color experiences are like in their effects on subiccts—wh<—:ther they are comforting, or arousing, or whatever. But, according to the argument, Mary didn’t know how any color looks or, equivalently, what color experience is like in itself, not just in its effects O1'1 subjects. This particular nonintentional fact about the quality of color c-zxpc-2ri<—:ncc-—this phenomenal fact, as it is often describcd—she did not. (shrink)

According to social externalism, it is possible to possess a concept not solely in virtue of one’s intrinsic properties but also in virtue of relations to one’s linguistic community. Derek Ball (2009) argues, in effect, that (i) social externalism extends to our concepts of colour experience and (ii) this fact undermines both the knowledge argument against physicalism and the most popular physicalist response to it, known as the phenomenal concept strategy. I argue that Ball is mistaken about (ii) (...) even granting (i). The knowledge argument and the phenomenal concept strategy might have to be modified to make them consistent with social externalism, but not in fundamental or detrimental ways. (shrink)

I argue on linguistic grounds that when Mary comes to know what it's like to see a red thing, she comes to know a certain inexpressible truth about the character of her own experience. This affords a "no concept" reply to the knowledge argument. The reason the Knowledge Argument has proven so intractable may be that we believe that an inexpressible concept and an expressible concept cannot have the same referent.

This book presents a strong case for substance dualism and offers a comprehensive defense of the knowledge argument, showing that materialism cannot accommodate or explain the 'hard problem' of consciousness. Bringing together the discussion of reductionism and semantic vagueness in an original and illuminating way, Howard Robinson argues that non-fundamental levels of ontology are best treated by a conceptualist account, rather than a realist one. In addition to discussing the standard versions of physicalism, he examines physicalist theories such (...) as those of McDowell and Price, and accounts of neutral monism and panpsychism from Strawson, McGinn and Stoljar. He also explores previously unnoticed historical parallels between Frege and Aristotle, and between Hume and Plotinus. His book will be a valuable resource for scholars and advanced students of philosophy of mind, in particular those looking at consciousness, dualism, and the mind-body problem. (shrink)

Frank Jackson formulated his knowledge argument as an argument for dualism. In this paper I show how the argument can be modified to also establish the irreducibility of the secondary qualities to the properties of physical theory, and ultimately "secondary quality eliminativism"-the view that the secondary qualities are physically uninstantiated. In addition to being of interest in its own right, this new argument provides a perspective to better see that certain popular would-be refutations of the (...) knowledge argument do not work. But it also introduces some complications that will force us to take an unexpected detour through the pros and cons of naturalizing intentionality before embracing Jackson's dualist conclusion. (shrink)

According to constitutive reductionism of Derek Parfit, a subject/person is not a separate existing being but his existence consists in the existence of a brain and body, performance of actions, thinking and occurrence of other physical and mental events. The identity of the subject in time comes down only to “Relation R” - mental consistency and/or connectedness – elicited by appropriate reasons. In the following article, I will try, relying on Frank Johnson's Knowledge Argument, to argue in favour (...) of the following conclusions: a person/subject is a “fact”irreducible to body and physical relations with the environment and a subject is something/”fact” non-reducible to mental occurrences. (shrink)

Frank Jackson first presented the Knowledge Argument in "Epiphenomenal Qualia" 1982). The KA is an argument against physicalism, the doctrine that everything is physical. The general thrust of the KA is that physicalism errs by misconstruing or denying the existence of the subjective features of experience. Physicalists have given numerous responses, and the debate continues about whether the KA ultimately succeeds in refuting any or all forms of physicalism. Jackson himself has recently.

Yujin Nagasawa has recently defended Frank Jackson’s knowledge argument from the “inconsistency objection.” The objection claims that the premises of the knowledge argument are inconsistent with qualia epiphenomenalism. Nagasawa defends Jackson by showing that the objection mistakenly assumes a causal theory of phenomenal knowledge. I argue that although this defense might succeed against two versions of the inconsistency objection, mine is unaffected by Nagasawa’s argument, in which case the inconsistency in the knowledge (...) class='Hi'>argument remains. (shrink)

The knowledge argument aims to refute physicalism, the doctrine that the world is entirely physical. Physicalism is widely accepted in contemporary philosophy. But some doubt that phenomenal consciousness.

A defense of Frank Jackson's knowledge argument from an objection raised by Michael Tye , according to which Mary acquires no new factual knowledge when she first sees red but, instead, merely comes to know old facts in a new way.

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)

This paper offers a new solution to the knowledge argument. Both a priori and a posteriori physicalists reject the claim that Mary does not know all the facts, but they do so for different reasons. While the former think that Mary gains no new knowledge of any fact, the latter think that Mary gains new knowledge of an old fact. This paper argues that on a broad understanding of what counts as physical, it is consistent with (...) physicalism that Mary does not know all the physical facts, and that on a narrow understanding, it is consistent with physicalism that Mary knows all the physical facts, but not all the facts. Either way, Mary gains new knowledge of a new fact that is not non-physical. The resultant view. (shrink)

Suppose that, for one reason or another, the knowledge argument fails as a refutation of physicalism. Even so, it remains the case that there is a pressing question for physicalists raised by the argument. Does Mary acquire old information or misinformation when she leaves the black and white room? Answering this question requires physicalists to address the tricky question of the informational content of colour experiences – what information do colour experiences deliver by virtue of being the (...) kinds of experiences they are? (shrink)

On the self-locating response to the knowledge argument Content Type Journal Article DOI 10.1007/s11098-010-9612-2 Authors Daniel Stoljar, Philosophy Program, Research School of Social Sciences, The Australian National University, Canberra ACT, 0200 Australia Journal Philosophical Studies Online ISSN 1573-0883 Print ISSN 0031-8116.

The knowledge argument is an argument against physicalism that was first formulated by Frank Jackson in 1982. While Jackson no longer endorses it, it is still regarded as one of the most important arguments in the philosophy of mind. Physicalism is the metaphysical thesis that, roughly speaking, everything in this world—including tables, galaxies, cheese cakes, cars, atoms, and even our sensations— are ultimately physical. The knowledge argument attempts to undermine this thesis by appealing to the (...) following simple imaginary scenario: Mary is confined to a black-and-white room, is educated through black-and-white books and through lectures relayed on black-and white television. In this way she learns everything there is to know about the physical nature of the world. She knows all the physical facts about us and our environment, in a wide sense of ‘physical’ which includes everything in completed physics, chemistry, and neurophysiology, and all there is to know about the causal and relational facts consequent upon all this, including of course functional roles. (Jackson 1986, p. 291) The knowledge argument says that if physicalism is true, Mary knows everything in this world. However, it seems obvious that her knowledge is not yet complete. Suppose that.. (shrink)

The literature on the Knowledge Argument exhibits considerable confusion about the precise nature of the argument. I contend that a clarification of the essence of self-presenting properties provides an explanation of this confusion such that the confusion itself is evidence for dualism. I also claim that Mary gains six different sorts of knowledge after gaining sight, and I show how this claim provides a response to a physicalist undercutting defeater for the Knowledge Argument. I (...) try to show that this defeater is inadequate due to its failure to capture the epistemic richness of what happens to Mary. Finally, I indicate how my enriched version of the Knowledge Argument provides grounds for rejecting those varieties of physicalism that eschew a depiction of phenomenal propertiesas intrinsic attributes a subject exemplifies in favor of a view that treats them as functional roles a subject realizes. (shrink)

This paper is trying to show that it is not possible to use the Knowledge argument as independent evidence for the form of non-reductionism the Modal argument argues for. To show this, Jackson's famous 'Mary' thought experiment is imagined in a zombie world. This leads to the result that there are many problems in the Mary experiment, which cannot have anything to do with phenomenal Qualia, because the Zombie-Mary would encounter them as well, and once all these (...) problems are accounted for, it is no longer clear whether a Zombie-Mary is conceivable at all. Finally, an alternative explanation for the strong non-reductive intuitions of the Mary experiment is discussed. (shrink)

The Knowledge Argument is misconstructed. Knowing that it is ‘just obvious’ that Mary will learn something new on leaving her black and white room, we nevertheless assume she can acquire a complete knowledge of the physical inside it – thereby predetermining the outcome of the thought experiment in favour of a refutation of physicalism. If we reformulate the argument to leave the question of what she can learn in the room open, it becomes clear, not only (...) that physicalism can survive the Knowledge Argument, but also that there is only one perspective on the relationship between qualia and the physical that will permit it to do so. If physicalism is true, this perspective must be the correct view of the qualia-physical relationship – the solution to the mind-body problem, a conclusion supported by its ability to resolve a number of associated difficulties, including Kripke’s problem for proposed identities and Chalmers’ Hard Problem. (shrink)

It is argued that the knowledge argument fails against externalist theories of mind. Enclosing Mary and cutting her off from some properties denies part of the physical world to Mary, which has the consequence of denying her certain kinds of physical knowledge. The externalist formulation of experience is shown to differ in vehicle, content, and causal role from the internalist version addressed by the knowledge argument, and is supported by results from neuroscience. This means that (...) though the knowledge argument has some force against material internalists, it misses the mark entirely against externalist accounts. (shrink)

I much appreciated Elizabeth Schier's paper on Frank Jackson's knowledge argument, published in the January 2008 issue of Journal of Consciousness Studies (Schier, 2008) -- in part, I confess, because of resonances with my gestalt argument for free will (Hodgson, 2001; 2002; 2005; 2007a,b). I would like to offer two comments on this paper.

Jackson’s formulation of the knowledge argument has had an inestimable influence on the discussion of consciousness and the apparent problem it presents for physicalism. A common objection to KA is the ‘ignorance objection’. According to this objection, our intuitions about Mary merely reflect our ignorance of physical facts that are integral to the explanation of phenomenal consciousness. Armed with the insights of a future science, Mary would actually be able to deduce what it’s like to see red. We (...) only have the intuition that Mary would learn something new because we don’t know what she knows. Those sympathetic to KA have brushed away the ignorance objection on the grounds that evstructuren though we don’t know what the future science of consciousness will reveal, we do know what kind of facts it will contain and know that these are the wrong kind of facts from which to deduce facts about phenomenal consciousness. In other words, they suggest that the insight that underwrites KA is ‘future-proof’: it is not the kind of insight that could be displaced by new scientific knowledge. I argue that this strategy for defending KA is dialectically problematic and reveals a fundamental limitation of the Mary thought experiment. (shrink)

The article examines the viability of called ‘the knowledge argument’ that was designed to prove the irreducibility of the subjective, phenomenal aspect of experience to the physical. It is argued that this argument can successfully be defended against its criticism. Its critics are represented here by two physicalist approaches: the mode of presentation hypothesis (here Paul Churchland), and the ability hypothesis (here David Lewis and Laurence Nemirow). The defense of the general soundness of the knowledge (...) class='Hi'>argument is based on some important insights on the issue in question of Frank Jackson and Howard Robinson. It is argued that the physicalist counterarguments to the knowledge argument seem inadequate. The article concludes that it appears that the knowledge argument has still kept a significant amount of its initial force. (shrink)