5 ideas
291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
6408 | Russell needed three extra axioms to reduce maths to logic: infinity, choice and reducibility [Grayling] |
7803 | Modal logic began with translation difficulties for 'If...then' [Lewis,CI, by Girle] |
6414 | Two propositions might seem self-evident, but contradict one another [Grayling] |
293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |