 Suppose we call physicalism so defined subset realization physicalism or subset physicalism for short; what is the relation between it and supervenience physicalism? Supervenience physicalism does not entail subset physicalism since the fact that a property G supervenes on a property F does not entail anything about their causal powers. For example, if causation is a macro-phenomenon as some philosophers have held it to be, it may be that F has no causal powers at all, while G does. 