5 ideas
9390 | Logic guides thinking, but it isn't a substitute for it [Rumfitt] |
18119 | Mathematics is a mental activity which does not use language [Brouwer, by Bostock] |
18118 | Brouwer regards the application of mathematics to the world as somehow 'wicked' [Brouwer, by Bostock] |
9389 | Vague membership of sets is possible if the set is defined by its concept, not its members [Rumfitt] |
7296 | 'Grue' is not a colour [Milsted] |