Abstract

Since its inception, roughly sixteen years ago, the theory of the contingent identity of mental-states and brain-states has been argued on many fronts. I want here to examine and to try to meet one in particular of the objections raised in connection with this theory. The objection has been stated with especial force by Peter Herbst.Let us then investigate a proposition that there is a particular mental entity which is contingently identical with a particular brain state. In order to be able to test it, we must know which mental entity is supposed to be identical with what brain state. Therefore we need at least two clear and independent identifying references to serve as the basis of our proposition of identity. They must each be sufficient to individuate an entity, or else we cannot say what is identical with what, and they must be independent of each other, or else the identity proposition expressed in terms of them becomes tautologous.