The Inverted Spectrum

In this paper we advocate the thesis that qualia are tropes (or qualitons), and not (universal) properties. The main advantage of the thesis is that we can accept both the Wittgensteinian and Sellarsian assault on the given and the claim that only subjective and private states can do justice to the qualitative character of experience. We hint that if we take qualia to be tropes, we dissolve the problem of inverted qualia. We develop an account of sensory concept acquisition that (...) takes the presence of qualia as an enabling condition for learning. We argue that qualia taken to be qualitons are part of our mechanism of sensory concept acquisition. (shrink)

The sensorimotor theory of perception and consciousness is frequently presented as a variety of anti-representationalist cognitive science, and there is thus a temptation to suppose that those who take representation as bedrock should reject the approach. This paper argues that the sensorimotor approach is compatible with representationalism, and moreover that representationalism about phenomenal qualities, such as that advocated by Tye, would be more complete and less vulnerable to criticism if it incorporated the sensorimotor account of conscious feel. The paper concludes (...) by arguing that the project of naturalizing phenomenal qualities would nonetheless be better served by abandoning ‘representation’ talk altogether, a move that would require only a small modification of existing representationalist accounts. (shrink)

This paper revisits some classic thought experiments in which experiences are detached from their characteristic causal roles, and explores what these thought experiments tell us about qualia epiphenomenalism, i.e. the view that qualia are epiphenomenal properties. It argues that qualia epiphenomenalism is true just in case it is (nomologically) possible for experiences of the same type to have entirely different causal powers. This is done with the help of new conceptual tools regarding the concept of an epiphenomenal property. One conclusion (...) is that it is not obvious if qualia epiphenomenalism is false; and it is also not obvious what should make us believe that it is false---or for that matter, true. Connections between qualia epiphenomenalism, physicalism and nonphysicalist property dualism are further explored. (shrink)

There appears to be a temporal analogue to the Knowledge argument. If correct, it could be read as an argument that B-theorism is false: time is not completely described by McTaggart's B-series. We analyse the temporal knowledge argument in terms of Chalmers's 2-dimensional semantics. An adaptation of the most popular response to the Knowledge argument indicates that McTaggart's A-series and B-series have different modes of presentation.

Philosophers have adopted various names for the things in the beholder that have been supposed to provide a safe home for the colors and the rest of the properties that have been banished from the "external" world by the triumphs of physics: "raw feels", "sensa", "phenomenal qualities" "intrinsic properties of conscious experiences" "the qualitative content of mental states" and, of course, " qualia," the term I will use. There are subtle differences in how these terms have been defined, but I'm (...) going to ride roughshod over them. I deny that there are. (shrink)

In this paper I shall carefully examine some recent arguments for dualism. These arguments presuppose a strong version of physicalism that I consider inappropriate. I shall try to show that, if we reformulate the thesis of physicalism according to Kim's view of physicalism, there is a third option, a version of type physicalism, where physicalism and quaiia could be conciliated. In order to sketch this option, I shall consider the main argument against type physicalism: the explanatory gap argument, and two (...) arguments that Kim mentions against physicalism: the inverted spectrum / zombies argument and the intrinsicality argument. I shall try to show that these three arguments depend upon a misconception of the nature of our ordinary mental concepts. (shrink)

Palmer's target article is surely one of the most scientifically detailed and knowledgeable treatments of spectrum inversion ever. Unfortunately, it is built on a very shaky philosophical foundation, the notion of the "intrinsic". In the article's ontology, there are two kinds of properties of mental states, intrinsic properties and relational properties. The whole point of the article is that these aspects of experience are mutually exclusive: the intrinsic is nonrelational and the relational is nonintrinsic.

What, according to Locke, are ideas? I argue that Locke does not give an account of the nature of ideas. In the Essay, the question is simply set to one side, as recommended by the “Historical, plain Method” that Locke employs. This is exemplified by his characterization of ‘ideas’ in E I.i.8, and the discussion of the inverted spectrum hypothesis in E II.xxxii. In this respect, Locke's attitude towards the nature of ideas in the Essay is reminiscent of Boyle's diffident (...) attitude towards the nature of matter. In posthumously published work, however, Locke suggests that the enquiry into the nature of ideas is one of the things that the enquiry into the extent of human knowledge undertaken in the Essay actually shows to lie beyond the “compass of human understanding”. In this respect, Locke's attitude towards the nature of ideas is reminiscent of Sydenham's attitude towards the nature of diseases. (shrink)

Palmer's subjectivity barrier seems to be erected on a popular but highly suspect conception of visual experience, and his color room argument is invalid.

In restricting his analysis to the causal relations of functionalism, on the one hand, and the neurophysiological realizers of biology, on the other, Palmer has overlooked an alternative conception of the relationship between color experience and the brain - one that liberalises the relation between mental phenomena and their physical implementation, without generating functionalism.

There is reason to believe that people of different gender, race or age differ in spectra that are shifted relative to one another. Shifted spectra are not as dramatic as inverted spectra, but they can be used to make some of the same philosophical points.

This is terribly hard, Thouless, I'm sorry. I have thought over all this for years. … It is now as if we had ploughed furrows in different parts of a field. There is a lot left to do. Judging from their writings, most contemporary analytic philosophers have not been persuaded that “the inverted spectrum problem” is – as Wittgenstein maintained – really a conceptual puzzle calling for dissolution, rather than a straight problem calling for a solution. In this paper, I (...) present Wittgenstein's view as clearly and persuasively as I can, contrasting it with the views of Sidney Shoemaker and Ned Block, two of his more prominent critics. I conclude with a look at Frank Jackson's well-known Knowledge Argument, which, if successful, would demonstrate the futility of looking for a physicalist solution to the inverted spectrum and related philosophical problems. My goal is to combat what I take to be the common and unfortunate failure – among both physicalistically inclined philosophers, including Shoemaker and Block, and anti-physicalists, such as Jackson – to appreciate the force of Wittgenstein's arguments. (shrink)

Funkcinës psichiniø savybiø analizës atveriama jø materialiojo ákûnijimo ávairovës galimybë verèia materialistiná monizmà sàmonës filosofijoje formuluoti ne psichiniø ir fiziniø savybiø tapatumo, bet pirmøjø pareities nuo antrøjø tezæ. Pareities sàvoka sàmonës filosofijoje iðreiðkia minimalius reikalavimus fizikalistinëms teorijoms – paneigus pareities fizikalizmà bûtø paneigtos ir stipresnës fizikalizmoversijos. Straipsnyje tyrinëjama fizikalizmo kritika paremta vadinamuoju kokybiø perkeitimo galimybës argumentu. Parodoma, kad, viena vertus, toks argumentas negali bûti atremtas nuorodomis áempirinius duomenis, nes svarstoma hipotetinë situacija numano jos empiriná nestebimumà; kita vertus, jei svarstoma situacija (...) ið tikrøjø yra galima, tai kokybinës psichinës charakteristikos niekaip nërasusaistytos funkciðkai ar fiziologiðkai apraðomais ryðiais, vadinasi, antireduktyvistinæ iðvadà galima grástisvarstant ne tik atvejus, kai kokybës perkeistos, bet ir kai jø apskritai nëra.Pagrindiniai þodþiai: sàmonës filosofija, fizikalizmas, funkcionalizmas, pareitis, perkeistos kokybës. (shrink)

Spectrum inversion is a thought experiment, and I would wager that there is no better diagnostic test to the disciplinary affiliation of a randomly selected member of the audience than your reaction to a thought experiment. It is a litmus test. If you find that you are paying close attention, subvocalizing objections, and that your heart-rate and metabolism go up, you have turned pink: you are a philosopher. If on the other hand the thought experiment leaves you cold, and you (...) wonder why otherwise sensible people would worry about such things, you have turned blue and you are a psychologist. (shrink)

Proponents of the hard problem of consciousness argue that the zombie and inverted spectrum thought experiments demonstrate that consciousness cannot be physical. They present scenarios designed to demonstrate that it is conceivable that a physical replica of someone can have radically different or no conscious experiences, that such an experience-less replica is possible and therefore that materialism is false. I will argue that once one understands the limitations that the physics of this world puts on cognitive systems, zombies and the (...) inverted spectrum are not conceivable. (shrink)

By considering another version of the Inverted Earth thought experiment in which the protagonist is informed that she is implanted with inverting lenses behind her eyes, I argue that the thought experiment doesn’t successfully pose a challenge to representationalism because after many years, the protagonist’s visual experience of the sky of Inverted Earth would simply represent it as blue.

Inverted sensation arguments such as the inverted spectrum thought experiment are often criticized for relying on an unconstrained notion of 'qualia'. In reply to this criticism, 'qualia-free' arguments for inversion have been proposed, in which only physical changes happen: inversions in the world, such as the replacement of surface colors by their complements, and a rewiring of peripheral input cables to more central areas in the nervous system. I show why such constrained inversion arguments won't work. The first problem is (...) that the world lacks the symmetry required to invert physical properties in the way required. The second problem concerns 'rewiring'. Empirical evidence indicates that the rewirings are either impossible, or would not result in an inversion of sensation. I propose the deeper reason for the failure of constrained inversion arguments lies in the fact that sensations are not properties of brain states, but spread into the world and the body. (shrink)

Sydney Shoemaker is one of the most influential philosophers currently writing on philosophy of mind and metaphysics. The essays in this collection deal with the way in which we know our own minds, and with the nature of those mental states of which we have our most direct conscious awareness. Professor Shoemaker opposes the 'inner sense' conception of introspective self-knowledge. He defends the view that perceptual and sensory states have non-representational features - 'qualia' - that determine what it is like (...) to have them. Amongst the other topics covered are the unity of consciousness, and the idea that the 'first-person perspective' gives a privileged route to philosophical understanding of the nature of mind. This major collection is sure to prove invaluable to all advanced students of the philosophy of mind and cognitive science. (shrink)

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

Chalmers has argued for a form of property dualism on the basis of the concept of a zombie , and the concept of the inverted spectrum. He asserts that these concepts show that the facts about consciousness, such as experience or qualia, are really further facts about our world, over and above the physical facts. He claims that they are the hard part of the mind-body issue. He also claims that consciousness is a fundamental feature of the world like mass, (...) charge, etc. He says that consciousness does not logically supervene on the physical and all current attempts to assert an identity between consciousness and the physical are just as non-reductive as his dualism. They are simply correlations and are part of the problem of the explanatory gap. In this paper, three examples of strong identities between a sensation or a quale and a physiological process are presented, which overcome these problems. They explain the identity in an a priori manner and they show that consciousness or sensations logically supervene on the physical , in that it is logically impossible to have P and not to have Q. In each case, the sensation was predicted and entailed by the physical. The inverted spectrum problem for consciousness is overcome and explained by a striking asymmetry in colour space. It is concluded that as some physical properties realize some sensations or qualia that human zombies are not metaphysically possible and the explanatory gap is bridged in these cases. Thus, the hard problem is overcome in these instances. (shrink)