ABSTRACT
There is a sense in which I share the underlying motivation of the reduc - tionists-to see how a unified theory of consciousness and the brain might be logically possible. But whereas they wish essentially to bring the mind within the domain of physical science, I believe that to be impossible; rather, the methods of scientific description, analysis and explanation have to be extended to include the mind. . . . We should have in mind the ideal of an explanation of consciousness that shows it to be a necessary feature of certain biological systems-an explanation that allows us to see that such systems could not fail to be conscious. . . . I think it is inevitable that the pursuit of such an account will lead to an alteration of our conception of the physical world.
