Mind Body Problem.

The Mind-Body Problem

The mind-body problem is the problem: what is the relationship between mind and body? Or alternatively: what is the relationship between mental properties and physical properties?
Humans have (or seem to have) both physical properties and mental properties. People have (or seem to have)the sort of properties attributed in the physical sciences. These physical properties include size, weight, shape, colour, motion through space and time, etc. But they also have (or seem to have) mental properties, which we do not attribute to typical physical objects These properties involve consciousness (including perceptual experience, emotional experience, and much else), intentionality (including beliefs, desires, and much else), and they are possessed by a subject or a self.
Physical properties are public, in the sense that they are, in principle, equally observable by anyone. Some physical properties—like those of an electron—are not directly observable at all, but they are equally available to all, to the same degree, with scientific equipment and techniques. The same is not true of mental properties. I may be able to tell that you are in pain by your behaviour, but only you can feel it directly. Similarly, you just know how something looks to you, and I can only surmise. Conscious mental events are private to the subject, who has a privileged access to them of a kind no-one has to the physical.
The mind-body problem concerns the relationship between these two sets of properties. The mind-body problem breaks down into a number of components.

1. The ontological question: what are mental states and what are physical states? Is one class a subclass of the other, so that all mental states are physical, or vice versa? Or are mental states and physical states entirely distinct?
2. The causal question: do physical states influence mental states? Do mental states influence physical states? If so, how?

Different aspects of the mind-body problem arise for different aspects of the mental, such as consciousness, intentionality, the self.

3. The problem of consciousness: what is consciousness? How is it related to the brain and the body?
4. The problem of intentionality: what is intentionality? How is it related to the brain and the body?
5. The problem of the self: what is the self? How is it related to the brain and the body?

Other aspects of the mind-body problem arise for aspects of the physical. For example:

6. The problem of embodiment: what is it for the mind to be housed in a body? What is it for a body to belong to a particular subject?

The seemingly intractable nature of these problems have given rise to many different philosophical views.
Materialist views say that, despite appearances to the contrary, mental states are just physical states. Behaviourism, functionalism, mind-brain identity theory and the computational theory of mind are examples of how materialists attempt to explain how this can be so. The most common factor in such theories is the attempt to explicate the nature of mind and consciousness in terms of their ability to directly or indirectly modify behaviour, but there are versions of materialism that try to tie the mental to the physical without explicitly explaining the mental in terms of its behaviour-modifying role. The latter are often grouped together under the label ‘non-reductive physicalism’, though this label is itself rendered elusive because of the controversial nature of the term ‘reduction’.
Idealist views say that physical states are really mental. This is because the physical world is an empirical world and, as such, it is the intersubjective product of our collective experience.
Dualist views (the subject of this entry) say that the mental and the physical are both real and neither can be assimilated to the other. For the various forms that dualism can take and the associated problems, see below.
In sum, we can say that there is a mind-body problem because both consciousness and thought, broadly construed, seem very different from anything physical and there is no convincing consensus on how to build a satisfactorily unified picture of creatures possessed of both a mind and a body.
Other entries which concern aspects of the mind-body problem include (among many others): behaviorism, consciousness, eliminative materialism,epiphenomenalism, functionalism, identity theory, intentionality, mental causation, neutral monism, and physicalism.