6 ideas
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] |
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] |
5470 | The idea of laws of nature arose in the Middle Ages [Hall,AR, by Ellis] |