3 ideas
8942 | Lukasiewicz's L3 logic has three truth-values, T, F and I (for 'indeterminate') [Lukasiewicz, by Fisher] |
16861 | A false theory could hardly rival the explanatory power of natural selection [Darwin] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |