13 ideas
7910 | Pursue truth with the urgency of someone whose clothes are on fire [Ashvaghosha] |
9283 | Our ancient beliefs can never be overthrown by subtle arguments [Euripides] |
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] |
13832 | Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking] |
10067 | Gentzen proved the consistency of arithmetic from assumptions beyond arithmetic [Gentzen, by Musgrave] |
7906 | When the Buddha reached the highest level of insight, he could detect no self in the world [Ashvaghosha] |
7904 | The first stage of trance is calm amidst applied and discursive thinking [Ashvaghosha] |
7905 | The Buddha sought ultimate reality and the final goal of existence in his meditations [Ashvaghosha] |
7909 | The Eightfold Path concerns morality, wisdom, and tranquillity [Ashvaghosha] |
7908 | At the end of a saint, he is not located in space, but just ceases to be disturbed [Ashvaghosha] |