4 ideas
13099 | Analysing right down to primitive concepts seems beyond our powers [Leibniz] |
5022 | We hold a proposition true if we are ready to follow it, and can't see any objections [Leibniz] |
9548 | A mathematical object exists if there is no contradiction in its definition [Waterfield] |
467 | A virtue is a combination of intelligence, strength and luck [Ion] |