4 ideas
22094 | Subjective truth can only be sustained by repetition [Kierkegaard, by Carlisle] |
18189 | ZFC could contain a contradiction, and it can never prove its own consistency [MacLane] |
10245 | One geometry cannot be more true than another [Poincaré] |
22093 | Life is a repetition when what has been now becomes [Kierkegaard] |