6 ideas
17879 | Axiomatising set theory makes it all relative [Skolem] |
10121 | Contradiction is not a sign of falsity, nor lack of contradiction a sign of truth [Pascal] |
17878 | If a 1st-order proposition is satisfied, it is satisfied in a denumerably infinite domain [Skolem] |
17880 | Integers and induction are clear as foundations, but set-theory axioms certainly aren't [Skolem] |
17881 | Mathematician want performable operations, not propositions about objects [Skolem] |
21342 | A relation is internal if two things possessing the relation could not fail to be related [Moore,GE, by Heil] |