10 ideas
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] |
19722 | We could know the evidence for our belief without knowing why it is such evidence [Mittag] |
19723 | Evidentialism can't explain that we accept knowledge claims if the evidence is forgotten [Mittag] |
19720 | Evidentialism concerns the evidence for the proposition, not for someone to believe it [Mittag] |
19721 | Coherence theories struggle with the role of experience [Mittag] |
20239 | Unlike us, the early Greeks thought envy was a good thing, and hope a bad thing [Hesiod, by Nietzsche] |