display all the ideas for this combination of texts
4 ideas
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] |
17894 | We have no argument to show a statement is absolutely undecidable [Koellner] |