Abstract

Since the time of Descartes, various versions of a modal argument have been proffered for substance dualism. Until recently, the premise most frequently attacked is one that moves from conceivability to metaphysical possibility. However, more recently, a new criticism has surfaced, viz., an argument from contingent physicalism. The purpose of this article is to show that what I take to be the most sophisticated contingent physicalist criticism fails as a defeater of the modal argument. After stating and clarifying my version of the modal argument, I present arguments from contingent physicalist Trenton Merricks that are intended explicitly to be defeaters of premise (2) of the modal argument. Along the way, I give reasons for thinking that these arguments fail as defeaters of (2) and that Merricks’ contingent physicalism is false.