Persons,Simplicity, and Substance

A novel argument has recently been advanced against materialism—the view that human persons are identical to composite, material objects. The argument claims that pairs of people are not conscious and that the only viable explanation for why they are not is because pairs of people are not simple. The argument concludes that only a simple thing can be the subject of conscious states. In this paper, I offer an alternative explanation for why pairs of people are not conscious: pairs of people are not substances. I provide two characterizations of substantiality. The first proposal claims that substances have irreducible causal powers, and the second claims that substances cannot have other substances as proper parts. The alternative explanation based on these characterizations of substantiality shows that being conscious is compatible with materialism.