4 ideas
| 10245 | One geometry cannot be more true than another [Poincaré] |
| 10486 | If we are rebuilding our ship at sea, we should jettison some cargo [Boolos on Neurath] |
| 8485 | We must always rebuild our ship on the open sea; we can't reconstruct it properly in dry-dock [Neurath] |
| 2116 | The concept of an existing thing must contain more than the concept of a non-existing thing [Leibniz] |