Combining Texts

All the ideas for 'Later Letters to Dedekind', 'The Logical Syntax of Language' and 'Law and Authority'

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

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4 ideas

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets

17831

Cantor gives informal versions of ZF axioms as ways of getting from one set to another [Cantor, by Lake]

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

13342

Carnap defined consequence by contradiction, but this is unintuitive and changes with substitution [Tarski on Carnap]

5. Theory of Logic / C. Ontology of Logic / 4. Logic by Convention

13251

Each person is free to build their own logic, just by specifying a syntax [Carnap]

25. Social Practice / B. Equalities / 1. Grounds of equality

20486

Only liberty, equality and sympathy can stand up to anti-social people [Kropotkin]