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Full Idea
Why are covering concepts required for diachronic identities, when they must be supposed unnecessary for synchronic identities?
Clarification
'synchronic' is at the same time, 'diachronic' at different times
Gist of Idea
If diachronic identities need covering concepts, why not synchronic identities too?
Source
M.R. Ayers (Individuals without Sortals [1974], 'Prob')
Book Ref
-: 'Canadian Journal of Philosophy' [-], p.119