5 ideas
9390 | Logic guides thinking, but it isn't a substitute for it [Rumfitt] |
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
14082 | No sortal could ever exactly pin down which set of particles count as this 'cup' [Schaffer,J] |
9389 | Vague membership of sets is possible if the set is defined by its concept, not its members [Rumfitt] |
14081 | Identities can be true despite indeterminate reference, if true under all interpretations [Schaffer,J] |