3 ideas
18758 | Validity is provable, but invalidity isn't, because the model is infinite [Church, by McGee] |
10994 | Conditionals are true if minimal revision of the antecedent verifies the consequent [Stalnaker, by Read] |
7903 | The six perfections are giving, morality, patience, vigour, meditation, and wisdom [Nagarjuna] |