Absent Qualia

As far as an adequate understanding of phenomenal consciousness is concerned, representationalist theories of mind which are modelled on the information processing paradigm, are, as much as corresponding neurobiological or functionalist theories, confronted with a series of arguments based on inverted or absent qualia considerations. These considerations display the following pattern: assuming we had complete knowledge about the neural and functional states which subserve the occurrence of phenomenal consciousness, would it not still be conceivable that these neural states (or states (...) with the same causal r. (shrink)

The functionalist view of the nature of the mind is now widely accepted. Like behaviorism and physicalism, functionalism seeks to answer the question "What are mental states?" I shall be concerned with identity thesis formulations of functionalism. They say, for example, that pain is a functional state, just as identity thesis formulations of physicalism say that pain is a physical state.

We evaluate the role of embodiment in ordinary mental state ascriptions. Presented are five experiments on phenomenal state ascriptions to disembodied entities such as ghosts and spirits. Results suggest that biological embodiment is not a central principle of folk psychology guiding ascriptions of phenomenal consciousness. By contrast, results continue to support the important role of functional considerations in theory of mind judgments.

Machine generated contents note: 1 The Cartesian legacy -- The dominant paradigm -- Cartesian dualism -- The secret life of the body -- The Cartesian theatre -- The domain of reason -- The causal relevance of the mind -- Conclusion -- Further reading --2 Reductionism and the road to functionalism -- Causation, scientific realism, and physicalism -- Reductionism and central state materialism -- Problems with central state materialism -- Modified ontological physicalism: supervenience -- Modified explanatory physicalism: the disunity of -- (...) science picture -- Supervenient causation -- Functionalism -- Further reading --3 Computational models of mind -- Intentionality -- Rationality: the calculative account -- The computational model of mind -- Objections to the language of thought (1) -- Objections to the language of thought (2) -- Conclusion -- Further reading --4 The content of thought -- The internalist picture -- Externalism -- Singular thoughts -- Dual component theories -- Naturalistic externalism -- Teleological theories -- Conclusion -- Further reading --5 Anti-reductionist alternatives -- Interpretationalism -- Real patterns -- Direct interpretationalism -- Psychological causalism -- Modified psychological causalism -- Third-personalism and perspectivity -- The world from the point of view of the subject -- Context and culture -- Conclusion -- Further reading --6 The content of experience -- Consciousness -- The knowledge argument -- Absent qualia and inverted spectra -- Functionalist responses -- Internal monitoring -- Intentionalism -- Form and content -- The private language argument -- Further reading -- 7 Subjects of experience -- Subjectivity -- The subjective viewpoint -- Intersubjectivity -- Simulation theory -- Normativity and normality -- Expression -- Self-knowledge -- Conclusion -- Further reading --8 The embodied subject -- Mentality -- Desire -- Beyond the Cartesian body -- Metaphysical questions: multiple narratives -- Further reading -- Notes -- Bibliography -- Index. (shrink)

A chronic difficulty for functionalism is the problem of instantiations of a functionalist theory of mind which seem to lack some or all of the mental states--especially qualitative--we want to attribute to minds the theory describes. Here I discuss one such counterexample, Block’s system S, consisting of the population of China organized to simulate a single mind as described by some true, adequate, psychofunctionalist theory. I then defend a version of functionalism against this example, in part by an adaptation of (...) Dennett’s notion of “stances”. A true, adequate theory, as Block understands it, would be appropriate to Dennett’s “design” or (at best) “intentional” stance; but a genuinely true and adequate theory should instead coincide with a “personal” stance. Hence, if system S does instantiate such a theory, we must impute to it mental states, even qualitative, whether or not it “really" has them. Hence Block’s counterexample lacks force. (shrink)

It is widely accepted that conscious experience has a physical basis. That is, the properties of experience (phenomenal properties, or qualia) systematically depend on physical properties according to some lawful relation. There are two key questions about this relation. The first concerns the strength of the laws: are they logically or metaphysically necessary, so that consciousness is nothing "over and above" the underlying physical process, or are they merely contingent laws like the law of gravity? This question about the strength (...) of the psychophysical link is the basis for debates over physicalism and property dualism. The second question concerns the shape of the laws: precisely how do phenomenal properties depend on physical properties? What sort of physical properties enter into the laws' antecedents, for instance; consequently, what sort of physical systems can give rise to conscious experience? It is this second question that I address in this paper. (shrink)

It seems that we could be physically the same as we are now, only we would lack conscious awareness. If so, then nothing about our physical world is necessary for qualitative experience. However, a proper analysis of psychological functionalism eliminates this problem concerning the possibility of zombies. ‘Friends of absent qualia’ rely on an overly simple view of what counts as a functional analysis and of the function/structure distinction. The level of thought is not the only level at which one (...) might perform a functional analysis; all that is required for some description of a state to be functional is that it be defined in terms of its causal relations. Insofar as functionalism is not restricted to a higher level of analysis , then successful theories of consciousness should include whatever it is that makes those states have a qualitative character. (shrink)

John Searle and David Chalmers have each invoked the silicon-brain thought experiment, though to very different effect. Searle uses the possibility of silicon brains to argue that there is no ontological connection between consciousness and causal/functional role. Chalmers, on the other hand, thinks the possibility of silicon brains is grounds for positing a nomological connection between functional structure and consciousness . In this article I attempt to explain how they manage to draw such divergent conclusions from the very same thought (...) experiment. I argue that Searle's hypothesis of the Background coupled with the connection principle militate against his own interpretation of the silicon-brain thought experiment. This leaves him with no alternative, in his bid to undermine the principle of organizational invariance, but to assume the role of the apostate and disavow the silicon-brain thought experiment. (shrink)

This is a book about sensory states and their apparent characteristics. It confronts a whole series of metaphysical and epistemological questions and presents an argument for type materialism: the view that sensory states are identical with the neural states with which they are correlated. According to type materialism, sensations are only possessed by human beings and members of related biological species; silicon-based androids cannot have sensations. The author rebuts several other rival theories, and explores a number of important issues: the (...) forms and limits of introspective awareness of sensations, the semantic properties of sensory concepts, knowledge of other minds, and unity of consciousness. The book is a significant contribution to the philosophy of mind, and has much to say to psychologists and cognitive scientists. (shrink)

Functionalism, the philosophical theory that defines mental states in terms of their causal relations to stimuli, overt behaviour, and other inner mental states, has often been accused of being unable to account for the qualitative character of our experimential states. Many times such objections to functionalism take the form of conceivability arguments. One is asked to imagine situations where organisms who are in a functional state that is claimed to be a particular experience either have the qualitative character of that (...) experience altered or absent altogether. Many of these arguments are surprisingly advanced by materialist philosophers. I argue that if the conceivability arguments were successful against functionalism, then they would be successful against their alternative materialist views as well. So the conceivability arguments alone do not provide a good reason for materialists to abandon functionalism. I further argue that functionalism is best understood to be an empirical theory, and if it is so understood then the conceivability arguments have no force against it at all. A further consequence that emerges is that on an empirical functionalist view, qualia, if real, are properties in the domain of psychology. (shrink)

In this book, William Lycan reviews the diverse philosophical views on consciousness--including those of Kripke, Block, Campbell, Sellars, and Casteneda--and ..

The ‘Fading Qualia’ thought experiment of Chalmers purports to show that computationalism is very probably true even if dualism is true by considering a series of brains, with biological parts increasingly substituted for by artificial but functionally analagous parts in small steps, and arguing that consciousness would not plausibly vanish in either a gradual or sudden way. This defense of computationalism inspired an attack on computationalism by Bishop, who argued that a similar series of substitutions by parts that have the (...) correct physical activity but not the correct causal relationships must likewise preserve consciousness, purportedly showing that ‘Counterfactuals Cannot Count’ and if so ruining a necessary condition for computation to meaningfully distinguish between physical systems. In this paper, the case in which a series of parts are simply removed and substituted for only by imposing the correct boundary conditions to exactly preserve the functioning of the remaining partial brain is described. It is argued that consciousness must gradually vanish in this case, not by fading but by becoming more and more partial. This supports the non-centralized nature of consciousness, tends to support the plausibility of physicalism against dualism, and provides the proper counterargument to Bishop’s contention. It also provides an avenue of attack against the “Fading Qualia” argument for those who remain dualists. (shrink)

Qualia are phenomenal properties of sensations and perceptual states: they are whatever it is that gives such states their “felt,” qualitative character. (In speaking of sensations, I speak of course not of mental objects or mental contents, but of mental events—of sensings, not sensa.).

Two chronic problems have plagued functionalism in the philosophy of mind. The first is the chauvinism/liberalism dilemma, the second the absent qualia problem. The first problem is addressed by blocking excessively liberal counterexamples at a level of functional abstraction that is high enough to avoid chauvinism. This argument introduces the notion of emotional functional organization (EFO). The second problem is addressed by granting Block's skeptical conclusions with respect to mentality as such, while arguing that qualitative experience is a concomitant of (...) human mentality considered as a special case: a system with EFO implemented in an organic substrate. (shrink)

Experimenters generally infer whether participants have visual experiences based on metacognitive responses. We showed a well-studied blindsight participant, GY, several definitions of the term “qualia” and then questioned him about whether he felt or he experienced qualia in his normal and blind fields. We found, contrary to others who have used different methods for measuring qualia, that GY does not have qualia for stationary stimuli in his blind field. This novel method for directly assessing qualia embraces the idea that experiences (...) should be related by the experiencer, not the experimenter. (shrink)

Most philosophers of mind nowadays espouse two metaphysical views: Nonreductive Physicalism and the causal efficacy of the mental. Throughout this work I will refer to the conjunction of both claims as the Causal Autonomy of the Mental. Nevertheless, this position is threatened by a number of difficulties which are far more serious than one would imagine given the broad consensus that it has generated during the last decades. This paper purports to offer a careful examination of some of these difficulties (...) and show the considerable efforts that one has to undertake in order to try to overcome them. The difficulties examined will concern only metaphysical problems common to all special science properties but not specific of mental properties. So, in proposing a functionalist version of Nonreductive Physicalism in what follows, I will not attempt to answer to well known objections such as the absent qualia argument and the like. This should not be interpreted as a limitation! in the scope of this work. On the contrary, in dealing with more general objections we will try to evaluate a position which entails (under common assumptions) the Causal Autonomy of the Mental, namely: Nonreductive Physicalism plus the causal efficacy of special science properties. (shrink)

Ned Block’s Chinese Nation Argument is offered as a counterexample to Turing-machine functionalism. According to that argument, one billion Chinese could be organized to instantiate Turing-machine descriptions of mental states. Since we wouldn’t want to impute qualia to such an organized population, functionalism cannot account for the qualitative character of mental states like pain. Paul Churchland and Patricia Churchland have challenged that argument by trying to show that an adequate representation of the complexity of mind requires at least 10 30,000,000 (...) homunculi. As such a large collection of Chinese is beyond comprehension, the intuitive force of Block’s example would be undercut. I argue that Churchland and Church land erroneously assume that every possible input-state combination in the human Turing-machine table must be assigned a homunculus. I attempt to restore the intuitive force of Block’s thought experiment by pointing to a way to simulate the human mind that does not require any such staggering number of homunculi. (shrink)

Ned Block’s Chinese Nation Argument is offered as a counterexample to Turing-machine functionalism. According to that argument, one billion Chinese could be organized to instantiate Turing-machine descriptions of mental states. Since we wouldn’t want to impute qualia to such an organized population, functionalism cannot account for the qualitative character of mental states like pain. Paul Churchland and Patricia Churchland have challenged that argument by trying to show that an adequate representation of the complexity of mind requires at least 10 30,000,000 (...) homunculi. As such a large collection of Chinese is beyond comprehension, the intuitive force of Block’s example would be undercut. I argue that Churchland and Church land erroneously assume that every possible input-state combination in the human Turing-machine table must be assigned a homunculus. I attempt to restore the intuitive force of Block’s thought experiment by pointing to a way to simulate the human mind that does not require any such staggering number of homunculi. (shrink)

I defend the possibility of a functional account of the intrinsic qualities of sensory experience against the claim that functional characterization can only describe such qualities to the level of isomorphism of relational structures on those qualities. A form sensory holism might be true concerning the phenomenal, and this holism would account for some antifunctionalist intuition evoked by inverted spectrum and absent qualia arguments. Sensory holism is compatible with the correctness of functionalism about the phenomenal.

At the very heart of the mind-body problem is the question of the nature of consciousness. It is consciousness, and in particular _phenomenal_ consciousness, that makes the mind-body relation so deeply perplexing. Many philosophers hold that no defi nition of phenomenal consciousness is possible: any such putative defi nition would automatically use the concept of phenomenal consciousness and thus render the defi nition circular. The usual view is that the concept of phenomenal consciousness is one that must be explained by (...) means of specifi c examples and associated comments. (shrink)

One standard objection to the view that phenomenal experience is functionally determined is based upon what has come to be called ‘The Absent Qualia Hypothesis’, the idea that there could be a person or a machine that was functionally exactly like us but that felt or consciously experienced nothing at all . Advocates of this hypothesis typically maintain that we can easily imagine possible systems that meet the appropriate functional specifications but that intuitively lack any phenomenal consciousness. Ned Block , (...) for example, asks us to suppose that a billion Chinese people are each given a two-way radio with which to communicate with one another and with an artificial body. The movements of the body are controlled by the radio signals, and the signals themselves are made in accordance with instructions the Chinese people receive from a vast display in the sky which is visible to all of them. The instructions are such that the participating Chinese people together realize whatever programs the functionalist supposes underlie human phenomenal experience. (shrink)

The isomorphism constraint places plausible limits on the use of third-person evidence to explain color experience but poses no difficulty for functionalists; they themselves argue for just such limits. Palmer's absent qualia claim is supported by neither the Color Machine nor Color Room examples. The nature of color experience depends on relations external to the color space, as well as internal to it.