4 ideas
9879 | NF has no models, but just blocks the comprehension axiom, to avoid contradictions [Quine, by Dummett] |
9390 | Logic guides thinking, but it isn't a substitute for it [Rumfitt] |
9389 | Vague membership of sets is possible if the set is defined by its concept, not its members [Rumfitt] |
22908 | When one element contains the grounds of the other, the first one is prior in time [Leibniz] |