4 ideas
13166 | Essences are no use in mathematics, if all mathematical truths are necessary [Mancosu] |
14288 | 'If A,B' affirms that A⊃B, and also that this wouldn't change if A were certain [Jackson, by Edgington] |
13769 | Conditionals are truth-functional, but should only be asserted when they are confident [Jackson, by Edgington] |
23873 | Dividing history books into separate chapters is disastrous [Weil] |