5 ideas
15927 | Definition just needs negation, known variables, conjunction, disjunction, substitution and quantification [Weyl, by Lavine] |
11074 | 'It is true that this follows' means simply: this follows [Wittgenstein] |
11073 | Two and one making three has the necessity of logical inference [Wittgenstein] |
541 | Virtue comes more from habit than character [Critias] |
542 | Fear of the gods was invented to discourage secret sin [Critias] |