Full Idea
One view of a principle of individuation is what is called a 'criterion of identity', determining answers to questions about identity and distinctness at a time and over time - a principle of distinction and persistence.
Gist of Idea
A principle of individuation may pinpoint identity and distinctness, now and over time
Source
Penelope Mackie (How Things Might Have Been [2006], 8.2)
Book Reference
Mackie,Penelope: 'How Things Might Have Been' [OUP 2006], p.134
A Reaction
Since the term 'Prime Minister' might do this job, presumably there could be a de dicto as well as a de re version of individuation. The distinctness consists of chairing cabinet meetings, rather than being of a particular sex.