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Ideas for '', 'Introduction to the Theory of Logic' and 'Intuitionism: an Introduction'

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2 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 / A. Overview of Logic / 5. First-Order Logic

10897

A first-order 'sentence' is a formula with no free variables [Zalabardo]