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Ideas for 'fragments/reports', 'The Logical Syntax of Language' and 'Intro to 'The Reason's Proper Study''

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3 ideas

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]

5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / c. Grelling's paradox

10631

If 'x is heterological' iff it does not apply to itself, then 'heterological' is heterological if it isn't heterological [Hale/Wright]