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Ideas for 'Logic (Encyclopedia I)', 'Frege philosophy of mathematics' and 'works'

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5. Theory of Logic / A. Overview of Logic / 3. Value of Logic

9179	Frege frequently expressed a contempt for language [Frege, by Dummett]

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic

9820	In classical logic, logical truths are valid formulas; in higher-order logics they are purely logical [Dummett]