[Paul C. Anagnostopoulos]

I think Thomas Clark explains the dilemma well in this paper: Fear of Mechanism

Nevertheless, there is a general point to be made relevant to Stapp and others engaged in the quantum quest for consciousness and free will: when you finally pin it down, will it still be what you want? Stapp wants a ‘pragmatic theory of the mind/brain that allows our thoughts to be causally efficacious yet not controlled by local-mechanistic laws combined with random chance.’ But any good scientific theory of thought will of necessity show how thoughts themselves arise within a context, not merely how they cause behavior. That is, such a theory will place thought, consciousness, the will, mental agency, what have you, within a general, law-invoking explanation in which there are predictable antecedents as well as consequents. But libertarian free will is precisely that which by definition can’t have law-like or predictable antecedents, otherwise it wouldn’t be free in the required sense. So to find it within nature is to destroy it. Since knowledge explodes the causa sui self, its defenders tend to occupy the penumbra of science and psychology, where the light of explanation has yet to penetrate.

~~ Paul