Full Idea
The 'grounding problem' is that given all that the statue and the lump have in common, what could possibly ground their different modal properties?
Gist of Idea
Given the similarity of statue and lump, what could possibly ground their modal properties?
Source
Amie L. Thomasson (Ordinary Objects [2007], 04.4)
Book Reference
Thomasson,Amie L.: 'Ordinary Objects' [OUP 2010], p.81
A Reaction
Their modal properties are, of course, different, because only one of them could survive squashing. Thomasson suggests their difference of sort, but I'm not sure what that means, separately from what they actually are.