 Another way to bring out the sense in which type physicalism is too strong for physicalism is to focus on the possibility of multiple realizability, as philosophers call it. This is roughly the idea that physically very different creatures can nevertheless share psychological properties; see  multiple realizability.  A major benefit of supervenience physicalism is that, as usually understood, it is consistent with this possibility. But type physicalism is often thought of as not consistent with it, at least if we focus on instantiated psychological properties. If so, type physicalism may be false while supervenience physicalism may be true.