4 ideas
13099 | Analysing right down to primitive concepts seems beyond our powers [Leibniz] |
5022 | We hold a proposition true if we are ready to follow it, and can't see any objections [Leibniz] |
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
15035 | If universals are not separate, we can isolate them by abstraction [Boethius, by Panaccio] |