3 ideas
18801 | Classical negation is circular, if it relies on knowing negation-conditions from truth-conditions [Dummett] |
13832 | Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking] |
7903 | The six perfections are giving, morality, patience, vigour, meditation, and wisdom [Nagarjuna] |