3 ideas
8942 | Lukasiewicz's L3 logic has three truth-values, T, F and I (for 'indeterminate') [Lukasiewicz, by Fisher] |
74 | Even God could not undo what has been done [Agathon] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |