Combining Texts

All the ideas for 'works', 'Letters to Hugo Boxel' and 'Investigations into Logical Deduction'

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3 ideas

5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction

10121

Contradiction is not a sign of falsity, nor lack of contradiction a sign of truth [Pascal]

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]

21. Aesthetics / A. Aesthetic Experience / 5. Natural Beauty

4870	The most beautiful hand seen through the microscope will appear horrible [Spinoza]