6 ideas
21552 | Common speech is vague; its vocabulary and syntax must be modified, for precision [Russell] |
21551 | Empirical words need ostensive definition, which makes them egocentric [Russell] |
13165 | Geometrical proofs do not show causes, as when we prove a triangle contains two right angles [Proclus] |
5495 | Instances of pain are physical tokens, but the nature of pain is more abstract [Putnam, by Lycan] |
9569 | The origin of geometry started in sensation, then moved to calculation, and then to reason [Proclus] |
21550 | Science reduces indexicals to a minimum, but they can never be eliminated from empirical matters [Russell] |