Everything about The Problem Of Other Minds totally explained
The
problem of other minds has traditionally been regarded as an
epistemological challenge raised by the
skeptic. The challenge may be expressed as follows: given that I can only observe the behaviour of others, how can I know that others have minds? The thought behind the question is that no matter how sophisticated someone's behaviour is, behaviour on its own isn't sufficient to guarantee the presence of mentality. It remains possible, for example, that other people are actually nothing more than meaty automata. Perhaps the main argument offered against this possibility in the history of philosophy is the argument from analogy; it can be found in the works of
J.S. Mill,
A. J. Ayer, and
Bertrand Russell.
More recently, it has come to be appreciated that the epistemological issue is intimately related to
metaphysical and
conceptual issues. This is best appreciated by considering the examples of
type physicalism and philosophical
behaviourism. According to the type physicalist, to be in a certain type of mental state is just to be in a certain type of physical (
brain) state. So, if we can detect that another individual is in a certain type of physical state, then we can know that they're in a certain type of mental state. Thus, it seems that we can know, in a relatively unproblematic way, that other people are in certain mental states. In this case, the epistemological problem is dissolved by making a claim about the metaphysics of mind. Logical behaviourism, on the other hand, makes a claim about the nature of our mental concepts. This claim is that statements about mental phenomena can be analysed into statements about behaviour and behavioural dispositions. To be in a certain mental state, for example pain, is just to behave, or be disposed to behave, in certain ways. Since statements ascribing mental predicates to individuals make claims about nothing over and above their behaviour, they can be verified to be true or false by observation of behaviour. Thus, the behaviourist closes the conceptual gap between behaviour and mentality which is responsible for the epistemological problem.
Solipsism
Solipsists argue that there are indeed no minds but one's own and that attempting to prove the existence of another mind is futile. Proponents of this view argue that the world outside one's own mind can't be known and indeed might be nonexistent.
Reductionist View
The
reductionist viewpoint, supported by
John McDowell and others, has tried to tackle the first two propositions 1 and 2 (above), by putting forth certain modes of expression (such as being in pain) as privileged and allowing us direct access to the other's mind. Thus, although they'd admit from the problem of pretense, that at no one time can we claim to have access to another's mental state, they're not permanently unavailable to us.
Soft Materialist Viewpoint
Counter to the reductionist argument would be a more biological theory (and somewhat
materialistic viewpoint). Take the
eye and the perception of color. The light-sensing cone
cells of the
retina that respond to the portion of the
electromagnetic spectrum designated as "red" are tuned similarly in every person tested, so we might expect all people to experience red in the same way. However, we also know that some people are missing certain (or all of) types of cone cells in the eye; thus giving rise to
color blindness and other such visual variances. Similarly, differences in the distribution of
brain cells and
dendritic connections (among many other potential variances) could give rise to different mental states for the same stimulus. Cross-culturally, when people have a word for red, they agree with other cultures on which wavelengths of light best fit the term "red" (the same wavelengths that primarily excite the cone cells which detect red, and the red/green channel to the brain). Yet even if human eyes and brains may be built in such a way that the same wavelengths stand out for everybody, still it's conceivable that for different individuals these wavelengths could evoke experiences that differ. In particular, one external stimulus may give different experiences to the same individual according to which eye is used.
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