6 ideas
| 10180 | Mathematicians do not study objects, but relations between objects [Poincaré] |
| 19087 | The meaning or purport of a symbol is all the rational conduct it would lead to [Peirce] |
| 23569 | The only just cause for a war is a wrong received [Vitoria] |
| 23601 | Leaders can only attack foreigners who have done wrong (as with their own subjects) [Vitoria] |
| 23566 | Princes should not justify a war to their subjects, and doing so would undermine the state [Vitoria] |
| 23576 | Sacking a city is lawful if it motivates the attacking troops [Vitoria] |