12 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] |
| 13157 | Choose the true hypothesis, which is the most intelligible one [Leibniz] |
| 14783 | Logic, unlike mathematics, is not hypothetical; it asserts categorical ends from hypothetical means [Peirce] |
| 12221 | 'Corner quotes' (quasi-quotation) designate 'whatever these terms designate' [Quine] |
| 19321 | We might do without names, by converting them into predicates [Quine, by Kirkham] |
| 14788 | Mathematics is close to logic, but is even more abstract [Peirce] |
| 14786 | Some logical possibility concerns single propositions, but there is also compatibility between propositions [Peirce] |
| 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] |
| 13158 | The Copernican theory is right because it is the only one offering a good explanation [Leibniz] |
| 14784 | Ethics is the science of aims [Peirce] |