Full Idea
The only metaphysically defensible notion of an object is precisely that of an entity which possesses determinate identity-conditions.
Gist of Idea
To be an object at all requires identity-conditions
Source
E.J. Lowe (The Possibility of Metaphysics [1998], 1.3)
Book Reference
Lowe,E.J.: 'The Possibility of Metaphysics' [OUP 2001], p.11
A Reaction
I think he includes abstract objects in this. I suspect this view of muddling epistemology and ontology. Or overemphasising our conventions, rather than reality.