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Full Idea
Individuation principles are attempts to describe how to count entities in a given domain, by saying when there is one.
Gist of Idea
Individuation aims to count entities, by saying when there is one
Source
Jonathan Schaffer (Causation and Laws of Nature [2008], 3)
Book Ref
'Contemporary Debates in Metaphysics', ed/tr. Sider/Hawthorne/Zimmerman [Blackwell 2008], p.87
A Reaction
At last, someone tells me what they mean by 'individuation'! So it is just saying what your units are prior to counting, followed (presumably) by successful counting. It seems to aim more at kinds than at particulars.
Related Idea
Idea 13103 Numerical difference is a symmetrical notion, unlike proper individuation [Cover/O'Leary-Hawthorne]