13 ideas
| 14767 | The demonstrations of the metaphysicians are all moonshine [Peirce] |
| 14764 | I am saturated with the spirit of physical science [Peirce] |
| 18200 | Very large sets should be studied in an 'if-then' spirit [Putnam] |
| 18199 | Indispensability strongly supports predicative sets, and somewhat supports impredicative sets [Putnam] |
| 8857 | We must quantify over numbers for science; but that commits us to their existence [Putnam] |
| 3626 | Knowing the attributes is enough to reveal a substance [Descartes] |
| 14768 | Infallibility in science is just a joke [Peirce] |
| 3630 | Our thinking about external things doesn't disprove the existence of innate ideas [Descartes] |
| 14765 | Association of ideas is the best philosophical idea of the prescientific age [Peirce] |
| 14766 | Duns Scotus offers perhaps the best logic and metaphysics for modern physical science [Peirce] |
| 3631 | A blind man may still contain the idea of colour [Descartes] |
| 3640 | Possible existence is a perfection in the idea of a triangle [Descartes] |
| 3639 | Necessary existence is a property which is uniquely part of God's essence [Descartes] |