14 ideas
| 9540 | A 'value-assignment' (V) is when to each variable in the set V assigns either the value 1 or the value 0 [Hughes/Cresswell] |
| 9541 | The Law of Transposition says (P→Q) → (¬Q→¬P) [Hughes/Cresswell] |
| 9543 | The rules preserve validity from the axioms, so no thesis negates any other thesis [Hughes/Cresswell] |
| 9544 | A system is 'weakly' complete if all wffs are derivable, and 'strongly' if theses are maximised [Hughes/Cresswell] |
| 18933 | Not-Being obviously doesn't exist, and the five modes of Being are all impossible [Gorgias, by Diog. Laertius] |
| 7544 | Many people imagine that to experience is to understand [Goethe] |
| 7541 | Man never understands how anthropomorphic he is [Goethe] |
| 7543 | We gain self-knowledge through action, not thought - especially when doing our duty [Goethe] |
| 9866 | Gorgias says rhetoric is the best of arts, because it enslaves without using force [Gorgias, by Plato] |
| 5864 | Destroy seriousness with laughter, and laughter with seriousness [Gorgias] |
| 7540 | Beauty is a manifestation of secret natural laws [Goethe] |
| 7538 | The happiest people link the beginning and end of life [Goethe] |
| 7542 | The best form of government teaches us to govern ourselves [Goethe] |
| 7539 | To get duties from people without rights, you must pay them well [Goethe] |