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Ideas for 'A Problem about Substitutional Quantification?st1=Saul A. Kripke', 'Logical Consequence' and 'Tractatus Theologico-Politicus'

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5. Theory of Logic / A. Overview of Logic / 4. Pure Logic

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Formal logic is invariant under permutations, or devoid of content, or gives the norms for thought [Beall/Restall]