4 ideas
9465 | Substitutional universal quantification retains truth for substitution of terms of the same type [Jacquette] |
9466 | Nominalists like substitutional quantification to avoid the metaphysics of objects [Jacquette] |
13832 | Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking] |
1556 | By nature people are close to one another, but culture drives them apart [Hippias] |