Full Idea
We can usefully refer to 'individuation conditions', to distinguish objects of that kind from objects not of that kind, and to 'identity conditions', to distinguish objects within that kind from one another.
Gist of Idea
We 'individuate' kinds of object, and 'identify' particular specimens
Source
Cynthia Macdonald (Varieties of Things [2005], Ch.2)
Book Reference
Macdonald,Cynthia: 'Varieties of Things' [Blackwell 2005], p.59
A Reaction
So we individuate types or sets, and identify tokens or particulars. Sounds good. Should be in every philosopher's toolkit, and on every introductory philosophy course.
Related Idea
Idea 8291 Individuation principles identify what kind it is; identity criteria distinguish items of the same kind [Lowe]