Full Idea
The bundle theory for tropes treats properties inappositely as parts of objects. Objects can have parts, but an object's properties are not its parts, they are particular ways the object is.
Gist of Idea
Objects are not bundles of tropes (which are ways things are, not parts of things)
Source
C.B. Martin (The Mind in Nature [2008], 04.6)
Book Reference
Martin,C.B.: 'The Mind in Nature' [OUP 2008], p.44
A Reaction
The 'way an object is' seems a very vague concept. Most things that get labelled as tropes are actually highly complex. Without mention of causal powers I think these discussions drift in a muddle.