Full Idea
It may well be that the only way we have, ultimately, of individuating anything is to relate it uniquely to ourselves.
Gist of Idea
Maybe we can only individuate things by relating them to ourselves
Source
Roderick Chisholm (Person and Object [1976], 1.5)
Book Reference
Chisholm,Roderick: 'Person and Object' [Open Court 1976], p.31
A Reaction
I'm guessing that Chisholm is thinking of 'ourselves' as meaning just himself, but I'm thinking this is plausible if he means the human community. I doubt whether there is much a philosopher can say on individuation that is revealing or precise.