4 ideas
6408 | Russell needed three extra axioms to reduce maths to logic: infinity, choice and reducibility [Grayling] |
12735 | Everything has a fixed power, as required by God, and by the possibility of reasoning [Leibniz] |
490 | Everything happens by reason and necessity [Leucippus] |
6414 | Two propositions might seem self-evident, but contradict one another [Grayling] |