Combining Texts

All the ideas for 'works', 'Two Concepts of Liberty' and 'Commentary on Euclid's 'Elements''

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

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4 ideas

5. Theory of Logic / G. Quantification / 2. Domain of Quantification

17743

De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki]

14. Science / D. Explanation / 2. Types of Explanation / g. Causal explanations

13165

Geometrical proofs do not show causes, as when we prove a triangle contains two right angles [Proclus]

18. Thought / E. Abstraction / 1. Abstract Thought

9569	The origin of geometry started in sensation, then moved to calculation, and then to reason [Proclus]

25. Social Practice / A. Freedoms / 5. Freedom of lifestyle

20544

Berlin distinguishes 'negative' and 'positive' liberty, and rejects the latter [Berlin, by Swift]