Full Idea
Surely we make a distinction beween dispositional and nondispositional properties, and can mention paradigms of both sorts. ....It seems plain that predicates like 'square', 'round' and 'made of copper' are not dispositional.
Gist of Idea
'Square', 'round' and 'made of copper' show that not all properties are dispositional
Source
Sydney Shoemaker (Causality and Properties [1980], §03)
Book Reference
Shoemaker,Sydney: 'Identity, Cause and Mind' [OUP 2003], p.210
A Reaction
It might be possible to account for squareness and roundness in dispositional ways, and it is certainly plausible to say that 'made of copper' is not a property (even when it is a true predicate).