Combining Texts

All the ideas for 'Letter on Freedom', 'Natural Science (lost)' and 'works'

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

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3 ideas

2. Reason / B. Laws of Thought / 2. Sufficient Reason

5042	For every event it is possible for an omniscient being to give a reason for its occurrence [Leibniz]

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]

7. Existence / A. Nature of Existence / 6. Criterion for Existence

527	Everything exists which anyone perceives [Metrodorus of Chios]