Online research in philosophy

John Searle's The Rediscovery of the Min is a sustained attempt to locate the mind and the mental firmly in the realm of the physical. Consciousness ,claims Searle, is just an ordinary biological feature of the world ... More specifically,``[t]he mental state of consciousness is just an ordinary biological, that is, physical featureof the brain''. Searle is adamant: ``Consciousness,to repeat, is a natural biological phenomenon''.

In my book _The Conscious Mind_ , I deny a number of claims that John Searle finds "obvious", and I make some claims that he finds "absurd". But if the mind/body problem has taught us anything, it is that nothing about consciousness is obvious, and that one person's obvious truth is another person's absurdity. So instead of throwing around this sort of language, it is best to examine the claims themselves and the arguments that I give for them, to see whether Searle says anything of substance that touches them.

"The philosophy of mind is unique among contemporary philosophical subjects," writes John Searle, "in that all of the most famous and influential theories are false." In Mind, Searle dismantles these famous and influential theories as he presents a vividly written, comprehensive introduction to the mind. Here readers will find one of the world's most eminent thinkers shedding light on the central concern of modern philosophy. Searle begins with a look at the twelve problems of philosophy of mind--which he calls "Descartes and Other Disasters"--problems which he returns to throughout the volume, as he illuminates such topics as the freedom of the will, the actual operation of mental causation, the nature and functioning of the unconscious, the analysis of perception, and the concept of the self. One of the key chapters is on the mind-body problem, which Searle analyzes brilliantly. He argues that all forms of consciousness--from feeling thirsty to wondering how to translate Mallarme--are caused by the behavior of neurons and are realized in the brain system, which is itself composed of neurons. But this does not mean that consciousness is nothing but neuronal behavior. The main point of having the concept of consciousness, Searle points out, is to capture the first person subjective features of the phenomenon and this point is lost if we redefine consciousness in third person objective terms. Described as a "dragonslayer by temperament," John Searle offers here a refreshingly direct and open discussion of philosophy, one that skewers accepted wisdom even as it offers striking new insights into the nature of consciousness and the mind.

The problem of explaining the mind persists essentially unchanged today since the time of Plato and Aristotle. For the ancients, of course, it was not a question of the relation of mind to brain, though the question was fundamentally the same nonetheless. For Plato, the mind was conceived as distinct from the body and was posited in order to explain knowledge which transcends that available to the senses. For his successor, Aristotle, the mind was conceived as intimately related to the body as form is related to substance. On this conception, the mind is an abstract property or condition of the body itself -.

Explaining the mind by building machines with minds runs into the other-minds problem: How can we tell whether any body other than our own has a mind when the only way to know is by being the other body? In practice we all use some form of Turing Test: If it can do everything a body with a mind can do such that we can't tell them apart, we have no basis for doubting it has a mind. But what is "everything" a body with a mind can do? Turing's original "pen-pal" version (the TT) only tested linguistic capacity, but Searle has shown that a mindless symbol-manipulator could pass the TT undetected. The Total Turing Test (TTT) calls for all of our linguistic and robotic capacities; immune to Searle's argument, it suggests how to ground a symbol manipulating system in the capacity to pick out the objects its symbols refer to. No Turing Test, however, can guarantee that a body has a mind. Worse, nothing in the explanation of its successful performance requires a model to have a mind at all. Minds are hence very different from the unobservables of physics (e.g., superstrings); and Turing Testing, though essential for machine-modeling the mind, can really only yield an explanation of the body.

The mind-body problem concerns the relationship between mind and body, or nowadays - between mind or consciousness and the brain. As a relationship, this can be viewed from two perspectives: from body to mind and from mind to body. In this note I point out that the two readings of the problem are not symmetrical and that there are categorical differences between them. In particular, whereas the body to mind problem constitutes a mystery (cf. the contemporary hard problem), the mind to body problem may be approached from a psychological (as contrasted with philosophical) orientation that allows for concrete phenomenological investigation.

In this article, I examine and criticize John Searle's account of the relation between mind and body. Searle rejects dualism and argues that the traditional mind-body problem has a 'simple solution': mental phenomena are both caused by biological processes in the brain and are themselves features of the brain. More precisely, mental states and events are macro-properties of neurons in much the same way that solidity and liquidity are macro-properties of molecules. However, Searle also maintains that the mental is 'ontologically irreducible' to the physical, a view which follows from his understanding of the status and nature of consciousness. Consciousness is essential to the mind; subjectivity is essential to consciousness; and no purely objective, physical description of consciousness could ever capture or explain its essentially subjective character. None the less, Searle maintains that irreducibility is a 'trivial' result of our 'definitional practices' and is entirely compatible with his theory. I contend that this latter claim is based on an equivocation: Searle's conclusion only seems to follow because he alters and trivializes what philosophers ordinarily mean by 'reduction'. I also maintain that Searle's position is reductionist in the ordinary, nontrivial sense. For this reason, his theory fails to accommodate the subjective character of consciousness and fails to solve the traditional mind-body problem. Finally, I briefly discuss Searle's claim that he is not an epiphenomenalist, and argue that given the assumptions of his view there is no interesting causal role for consciousness in the physical world.