Combining Texts

All the ideas for 'works', 'Philosophical Letters from England' and 'Reply to Second Objections'

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3 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]

11. Knowledge Aims / B. Certain Knowledge / 4. The Cogito

3622	The Cogito is not a syllogism but a self-evident intuition [Descartes]

23. Ethics / B. Contract Ethics / 2. Golden Rule

7844	The Golden Rule is accepted everywhere, and gives a fixed target for morality [Voltaire]