Combining Philosophers

Ideas for Johann Fichte, Joseph Melia and New Scientist writers

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3 ideas

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not

22017

Normativity needs the possibility of negation, in affirmation and denial [Fichte, by Pinkard]

5. Theory of Logic / G. Quantification / 5. Second-Order Quantification

5740	Second-order logic needs second-order variables and quantification into predicate position [Melia]

5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models

5741	If every model that makes premises true also makes conclusion true, the argument is valid [Melia]