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Ideas for 'The Courtier and the Heretic', 'Frege' and 'works'

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4 ideas

4. Formal Logic / B. Propositional Logic PL / 1. Propositional Logic
7726 Aristotelian logic dealt with inferences about concepts, and there were also proposition inferences [Weiner]
4. Formal Logic / F. Set Theory ST / 1. Set Theory
13455 Frege did not think of himself as working with sets [Frege, by Hart,WD]
4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set
16895 The null set is indefensible, because it collects nothing [Frege, by Burge]
4. Formal Logic / F. Set Theory ST / 5. Conceptions of Set / c. Logical sets
3328 Frege proposed a realist concept of a set, as the extension of a predicate or concept or function [Frege, by Benardete,JA]