6 ideas
18170 | The Axiom of Reducibility is self-effacing: if true, it isn't needed [Quine] |
23476 | Logical constants seem to be entities in propositions, but are actually pure form [Russell] |
23477 | We use logical notions, so they must be objects - but I don't know what they really are [Russell] |
18273 | Logical truths are known by their extreme generality [Russell] |
22315 | There can't be a negative of a complex, which is negated by its non-existence [Potter on Russell] |
19000 | Read 'all ravens are black' as about ravens, not as about an implication [Belnap] |