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Ideas for 'On the Question of Absolute Undecidability', 'Being You' and 'Modality'

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3 ideas

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]

5. Theory of Logic / K. Features of Logics / 5. Incompleteness

17894

We have no argument to show a statement is absolutely undecidable [Koellner]