Spatio-Temporal Coincidence and the Grounding Problem

A lot of people believe that distinct objectscan occupy precisely the same place for theentire time during which they exist. Suchpeople have to provide an answer to the`grounding problem' – they have to explain howsuch things, alike in so many ways, nonethelessmanage to fall under different sortals, or havedifferent modal properties. I argue in detailthat they cannot say that there is anything invirtue of which spatio-temporally coincidentthings have those properties. However, I alsoargue that this may not be as bad as it looks,and that there is a way to make sense of theclaim that such properties are primitive.