display all the ideas for this combination of texts
4 ideas
| 6564 | To affirm 'p and not-p' is to have mislearned 'and' or 'not' [Quine] |
| 1698 | Both sides of contraries need not exist (as health without sickness, white without black) [Aristotle] |
| 1697 | The contrary of good is bad, but the contrary of bad is either good or another evil [Aristotle] |
| 11034 | The differentiae of genera which are different are themselves different in kind [Aristotle] |