4 ideas
13165 | Geometrical proofs do not show causes, as when we prove a triangle contains two right angles [Proclus] |
20653 | Six reduction levels: groups, lives, cells, molecules, atoms, particles [Putnam/Oppenheim, by Watson] |
23221 | The brain, and all the mental events within it, consists entirely of sensitive and rational matter [Cavendish] |
9569 | The origin of geometry started in sensation, then moved to calculation, and then to reason [Proclus] |