Combining Texts

All the ideas for 'Structure and Nature', 'The Logical Syntax of Language' and 'Logic [1897]'

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5 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]

6. Mathematics / B. Foundations for Mathematics / 7. Mathematical Structuralism / a. Structuralism

10242

I apply structuralism to concrete and abstract objects indiscriminately [Quine]

7. Existence / D. Theories of Reality / 6. Physicalism

10243

My ontology is quarks etc., classes of such things, classes of such classes etc. [Quine]

13. Knowledge Criteria / C. External Justification / 2. Causal Justification

11052

Psychological logic can't distinguish justification from causes of a belief [Frege]