10 ideas
| 5300 | Philosophers have interpreted the world, but the point is to change it [Marx] |
| 5297 | Whether human thinking can be 'true' must be decided in practice, not theory [Marx] |
| 10180 | Mathematicians do not study objects, but relations between objects [Poincaré] |
| 23647 | Objects have an essential constitution, producing its qualities, which we are too ignorant to define [Reid] |
| 11958 | Impossibilites are easily conceived in mathematics and geometry [Reid, by Molnar] |
| 22598 | The authentic self exists at the level of class, rather than the individual [Marx, by Dunt] |
| 23646 | Reference is by name, or a term-plus-circumstance, or ostensively, or by description [Reid] |
| 23645 | A word's meaning is the thing conceived, as fixed by linguistic experts [Reid] |
| 5298 | The human essence is not found in individuals but in social relations [Marx] |
| 5299 | Religious feeling is social in origin [Marx] |