11 ideas
| 15545 | Armstrong's analysis seeks truthmakers rather than definitions [Lewis] |
| 15546 | Predications aren't true because of what exists, but of how it exists [Lewis] |
| 15548 | Say 'truth is supervenient on being', but construe 'being' broadly [Lewis] |
| 14399 | Presentism says only the present exists, so there is nothing for tensed truths to supervene on [Lewis] |
| 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] |
| 13007 | Archimedes defined a straight line as the shortest distance between two points [Archimedes, by Leibniz] |
| 10067 | Gentzen proved the consistency of arithmetic from assumptions beyond arithmetic [Gentzen, by Musgrave] |
| 15543 | How do things combine to make states of affairs? Constituents can repeat, and fail to combine [Lewis] |