4 ideas
18758 | Validity is provable, but invalidity isn't, because the model is infinite [Church, by McGee] |
9591 | The human intellect has not been, and cannot be, fully formalized [Nagel/Newman] |
22745 | Pherecydes said the first principle and element is earth [Pherecydes, by Sext.Empiricus] |
5883 | Pherecydes was the first to say that the soul is eternal [Pherecydes, by Cicero] |