This paper argues, not that physicalism is wrong, but that it is irrational. The paper defines standards of rationality, both metaphysical and epistemological, that physicalism necessarily inherits from science. Then it assesses physicalist efforts to naturalize consciousness in light of these. It concludes that physicalism allows its metaphysics to outrun its epistemology, in defiance of applicable standards, revealing a fundamental incoherence in the doctrine. The paper also briefly reviews other naturalization programs, to claim that physicalism, unlike the sciences, hasn’t proved (...) fruitful. (shrink)

This article uses causation to show that panpsychism and emergentism share far less than most philosophers suppose. It argues that panpsychism has features, among them its rationalism, that force what the article calls a strong account of causation. And that emergentism entails what the article calls a weak account of causation incompatible with any strong account. The article then ventures that panpsychism and emergentism form parts of two wide-ranging but incompatible metaphysical packages.

Any panpsychism building complex consciousness out of basic atoms of consciousness needs a theory of ‘mental chemistry’ explaining how this building works. This paper argues that split-brain patients show actual mental chemistry or at least give reasons for thinking it possible. The paper next develops constraints on theories of mental chemistry. It then puts forward models satisfying these constraints. The paper understands mental chemistry as a transformation consistent with conservation of consciousness rather than an aggregation perhaps followed by the creation (...) of something in addition. The paper suggests that this kind of mental chemistry alone yields a workable panpsychism. (shrink)