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Ideas for 'Classical Cosmology (frags)', 'Introduction to the Theory of Logic' and 'Set Theory and Its Philosophy'

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2 ideas

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]

5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic

10704

We can formalize second-order formation rules, but not inference rules [Potter]