Full Idea
Any account of the identity of material objects which turns on the identity of places and times must face the objection that the identity of places and times depends, in turn, on the identities of the objects located at them.
Gist of Idea
Times and places are identified by objects, so cannot be used in a theory of object-identity
Source
Michael J. Loux (Metaphysics: contemporary introduction [1998], p.56)
Book Reference
Loux,Michael J.: 'Metaphysics: a contemporary introduction' [Routledge 2000], p.56
A Reaction
This may be a benign circle, in which we concede that there are two basic interdependent concepts of objects and space-time. If you want to define identity - in terms of what?