6 ideas
9560 | S5 provides the correct logic for necessity in the broadly logical sense [Fine,K] |
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] |
21342 | A relation is internal if two things possessing the relation could not fail to be related [Moore,GE, by Heil] |