11 ideas
| 19044 | Saying truths fit experience adds nothing to truth; nothing makes sentences true [Davidson] |
| 11022 | Gentzen introduced a natural deduction calculus (NK) in 1934 [Gentzen, by Read] |
| 11065 | The inferential role of a logical constant constitutes its meaning [Gentzen, by Hanna] |
| 11023 | The logical connectives are 'defined' by their introduction rules [Gentzen] |
| 11213 | Each logical symbol has an 'introduction' rule to define it, and hence an 'elimination' rule [Gentzen] |
| 10067 | Gentzen proved the consistency of arithmetic from assumptions beyond arithmetic [Gentzen, by Musgrave] |
| 6400 | Without the dualism of scheme and content, not much is left of empiricism [Davidson] |
| 6398 | Different points of view make sense, but they must be plotted on a common background [Davidson] |
| 6399 | Criteria of translation give us the identity of conceptual schemes [Davidson] |
| 13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
| 20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |