6 ideas
17879 | Axiomatising set theory makes it all relative [Skolem] |
18170 | The Axiom of Reducibility is self-effacing: if true, it isn't needed [Quine] |
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] |