3 ideas
15927 | Definition just needs negation, known variables, conjunction, disjunction, substitution and quantification [Weyl, by Lavine] |
6456 | Sense-data are neutral uninterpreted experiences, separated from objects and judgements [Angeles] |
6011 | There is a remote first god (the Good), and a second god who organises the material world [Numenius, by O'Meara] |