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Ideas for 'The Logical Syntax of Language', 'Forget the 'correspondence theory of truth'' and 'Non-Monotonic Logic'

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4 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 / K. Features of Logics / 10. Monotonicity

19110

In classical logic the relation |= has Monotony built into its definition [Antonelli]

19112

Cautious Monotony ignores proved additions; Rational Monotony fails if the addition's negation is proved [Antonelli]