Full Idea
Constitution theorists need to posit sortal properties of 'being a thread' or 'being a sweater', as grounds for the differences betwween the sweater and the thread that constitutes it.
Gist of Idea
Constitution theory needs sortal properties like 'being a sweater' to distinguish it from its thread
Source
Katherine Hawley (How Things Persist [2001], 5.1)
Book Reference
Hawley,Katherine: 'How Things Persist' [OUP 2004], p.146
A Reaction
This is further grounds for thinking the constitution view ridiculous, because there are no such properties. 'Being a sweater' is a category, which something belongs in if it has all the properties of a sweater. The final property triggers sweaterhood.
Related Idea
Idea 16228 The constitution theory is endurantism plus more than one object in a place [Hawley]