Having a Part Twice Over
نویسنده
چکیده
I argue that is intuitive and useful to think about composition in light of the familiar functionalist distinction between role and occupant. This involves factoring the standard notion of parthood into two related notions: being a parthood slot and occupying a parthood slot. One thing is part of another just in case it fills one of that thing’s parthood slots. This move opens room to rethink mereology in various ways, and, in particular, to see the mereological structure of a composite as potentially outreaching the individual entities that are its parts. I sketch one formal system that allows things to have individual entities as parts multiple times over. This is particularly useful to David Armstrong, given Lewis’ charge that his structural universals must do exactly that. I close by reflecting upon the nature and point of formal mereology.
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