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Ideas for 'fragments/reports', 'Consciousness,Represn, and Knowledge' and 'Principles of Theoretical Logic'

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4. Formal Logic / C. Predicate Calculus PC / 1. Predicate Calculus PC

17750	The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki]
	Full Idea: The first clear proof of the consistency of the first order predicate logic is found in the 1928 book of Hilbert and Ackermann.
	From: report of Hilbert,D/Ackermann,W (Principles of Theoretical Logic [1928]) by Michal Walicki - Introduction to Mathematical Logic History E.2.1