Combining Texts

All the ideas for 'fragments/reports', 'Investigations into Logical Deduction' and 'Counterfactual Dependence and Time's Arrow'

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3 ideas

5. Theory of Logic / H. Proof Systems / 4. Natural Deduction

13832

Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking]

13. Knowledge Criteria / E. Relativism / 2. Knowledge as Convention

1556	By nature people are close to one another, but culture drives them apart [Hippias]

26. Natural Theory / C. Causation / 5. Direction of causation

8433	There are few traces of an event before it happens, but many afterwards [Lewis, by Horwich]