4 ideas
12887 | A whole must have one characteristic, an internal relation, and a structure [Rescher/Oppenheim] |
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] |
9569 | The origin of geometry started in sensation, then moved to calculation, and then to reason [Proclus] |