4 ideas
13832 | Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking] |
22363 | You have only begun to do real science when you can express it in numbers [Kelvin] |
19216 | Propositions (such as 'that dog is barking') only exist if their items exist [Williamson] |
20644 | Energy has progressed from a mere formula, to a principle pervading all nature [Kelvin] |