4 ideas
16974 | The nature of each logical concept is given by a collection of inference rules [Correia] |
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
4038 | Properties are sets of their possible instances (which separates 'renate' from 'cordate') [Lewis, by Mellor/Oliver] |
16973 | Explain logical necessity by logical consequence, or the other way around? [Correia] |