|Classes: identity of classes provided by same elements (extension) - identity of properties by the same predicates (intension)._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. |
Class/Prior: we think of it as a term for what we describe as identical if condition (2) is satisfied: (2) ∏x∏yEφxyφxy._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution.
Objects of thought Oxford 1971
Arthur N. Prior
Papers on Time and Tense 2nd Edition Oxford 2003