The problem is one of opposition between subjective and objective points of view. There is a tendency to seek an objective account of everything befo… - Thomas Nagel

What is more subjective is not necessarily more private. In general it is intersubjectively available. I assume that the intersubjective ideas of experience, of action, and of the self are in some sense public or common property. That is why the problems of mind and body, free will, and personal identity are not just problems about one's own case.

In speaking of the move from subjective to objective characterization, I wish to remain noncommittal about the existence of an endpoint, the completely objective intrinsic nature of the thing, which one might or might not be able to reach. It may be more accurate to think of objectivity as a direction in which the understanding can travel. And in understanding a phenomenon like lightning, it is legitimate to go as far away as one can from a strictly human viewpoint.<p>But in the case of experience, on the other hand, the connexion with a particular point of view seems much closer. It is difficult to understand what could be meant by the objective character of an experience, apart from the particular point of view from which its subject apprehends it. After all, what would be left of what it was like to be a bat if one removed the viewpoint of the bat?

I believe that there is a necessary connection in both directions between the physical and the mental, but that it cannot be discovered a priori. Opinion is strongly divided on the credibility of some kind of functionalist reductionism, and I won't go through my reasons for being on the antireductionist side of that debate. Despite significant attempts by a number of philosophers to describe the functional manifestations of conscious mental states, I continue to believe that no purely functionalist characterization of a system entails — simply in virtue of our mental concepts — that the system is conscious.