A different assessment denies that haecceitism and physicalism are in tension with one another by taking the scope of physicalism to be restricted to qualitative properties. So understood, haecceitism has no significance for the fate of physicalism, since haecceitistic differences are purely non-qualitative in character. For those who characterize physicalism as the thesis that worlds that are physical duplicates of one another are duplicates simpliciter, this response is especially plausible, since talk of “duplication” is typically restricted to qualitative properties. (See Stoljar (2010: 136) on the options for formulating physicalism.)