14 ideas
| 14782 | Philosophy is an experimental science, resting on common experience [Peirce] |
| 14787 | Self-contradiction doesn't reveal impossibility; it is inductive impossibility which reveals self-contradiction [Peirce] |
| 14783 | Logic, unlike mathematics, is not hypothetical; it asserts categorical ends from hypothetical means [Peirce] |
| 14788 | Mathematics is close to logic, but is even more abstract [Peirce] |
| 17644 | Metaphysical realism is committed to there being one ultimate true theory [Putnam] |
| 17648 | It is an illusion to think there could be one good scientific theory of reality [Putnam] |
| 17643 | Shape is essential relative to 'statue', but not essential relative to 'clay' [Putnam] |
| 14786 | Some logical possibility concerns single propositions, but there is also compatibility between propositions [Peirce] |
| 17642 | The old view that sense data are independent of mind is quite dotty [Putnam] |
| 14789 | Experience is indeed our only source of knowledge, provided we include inner experience [Peirce] |
| 14785 | The world is one of experience, but experiences are always located among our ideas [Peirce] |
| 1556 | By nature people are close to one another, but culture drives them apart [Hippias] |
| 14784 | Ethics is the science of aims [Peirce] |
| 17645 | An alien might think oxygen was the main cause of a forest fire [Putnam] |