Full Idea
Absolutely unrestricted qualitative composition would imply that objects with incompatible properties and objects such as winged pigs or golden mountains were actual.
Gist of Idea
Absolutely unrestricted qualitative composition would allow things with incompatible properties
Source
L.A. Paul (In Defense of Essentialism [2006], §5)
Book Reference
'Metaphysics (Philosophical Perspectives 20)', ed/tr. Hawthorne,John [Blackwell 2006], p.360
A Reaction
Note that this is 'qualitative' composition, and not composition of parts. The objection seems to rule out unrestricted qualitative composition, since you could hardly combine squareness with roundness.