Combining Texts

All the ideas for 'Set Theory and related topics (2nd ed)', 'Notes on John Wilkins' and 'Remarks on the forces of inorganic Nature'

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

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3 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / e. Equivalence classes

8920	Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz]

9. Objects / D. Essence of Objects / 14. Knowledge of Essences

12694

Essence is the distinct thinkability of anything [Leibniz]

27. Natural Reality / A. Classical Physics / 1. Mechanics / d. Gravity

13605

Gravity isn't a force, because it produces effects without diminishing [Mayer]