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Ideas for '', 'Ancient Philosophy: very short introduction' and 'The Rise of Analytic Philosophy 1879-1930'

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6 ideas

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic

11211

If a sound conclusion comes from two errors that cancel out, the path of the argument must matter [Rumfitt]

5. Theory of Logic / B. Logical Consequence / 3. Deductive Consequence |-

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Frege's sign |--- meant judgements, but the modern |- turnstile means inference, with intecedents [Potter]

5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism

22291

Deductivism can't explain how the world supports unconditional conclusions [Potter]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

11212

The sense of a connective comes from primitively obvious rules of inference [Rumfitt]

11210

Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt]

5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth

22295

Modern logical truths are true under all interpretations of the non-logical words [Potter]