5 ideas
6408 | Russell needed three extra axioms to reduce maths to logic: infinity, choice and reducibility [Grayling] |
16635 | Incorporeal substances are powers or forces [Descartes, by Pasnau] |
6414 | Two propositions might seem self-evident, but contradict one another [Grayling] |
467 | A virtue is a combination of intelligence, strength and luck [Ion] |
16684 | Impenetrability only belongs to the essence of extension [Descartes] |