Combining Texts

All the ideas for 'reports', 'Principles of Theoretical Logic' and 'Letters to Descartes'

expand these ideas     |    start again     |     specify just one area for these texts

3 ideas

4. Formal Logic / C. Predicate Calculus PC / 1. Predicate Calculus PC
17750 The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki]
10. Modality / A. Necessity / 8. Transcendental Necessity
3016 Even the gods cannot strive against necessity [Pittacus, by Diog. Laertius]
17. Mind and Body / A. Mind-Body Dualism / 8. Dualism of Mind Critique
23222 A soul with physical extension is more likely than an immaterial soul that moves bodies [Elizabeth]