|Abstraction: Subsumption of objects by non-consideration of certain properties. See also equivalence relation, concretion, concreta, indiscernibility.|
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"extensional abstraction" / Prior: says that it is not about real entities but only surrogates - e.g. identity of "nothing φ-es" with "everything that φ-es is not identical with itself."
PriorVsAbstraction: it is not certain whether the vernacular requires a.: E.g. Cook Wilson: instead of "Jones is musically talented": what is predicted, is musicality - PriorVs: "-ty" or "-ness" is always just a trick. (> Vsuniversals)
Objects of thought Oxford 1971
Arthur N. Prior
Papers on Time and Tense 2nd Edition Oxford 2003