4 ideas
8920 | Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz] |
15312 | We get the idea of power by abstracting from ropes, magnets and electric shocks [Priestley] |
3102 | Why don't we experience or remember going to sleep at night? [Magee] |
15311 | Attraction or repulsion are not imparted to matter, but actually constitute it [Priestley] |