4 ideas
19043 | Bivalence applies not just to sentences, but that general terms are true or false of each object [Quine] |
10180 | Mathematicians do not study objects, but relations between objects [Poincaré] |
19042 | Terms learned by ostension tend to be vague, because that must be quick and unrefined [Quine] |
12710 | As well as extension, bodies contain powers [Leibniz] |