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

[general ideas about standard predicate logic]

2 ideas
The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann ,by Walicki]
Predicate logic has connectives, quantifiers, variables, predicates, equality, names and brackets [Melia]