Philosophy Lexicon of Arguments

Natural deduction, logic: is a calculus by Gerhard Gentzen (Gentzen, “Untersuchungen über das logische Schließen“. In Mathematische Zeitschrift Band 39, 1935, pp. 176–210, 405–431), which largely manages without axioms and instead works with introductory and eliminating rules for the operators used. Assumptions that are needed in the course of time can be partly eliminated later. See also axiomatization, axiom systems, axioms, inference.
Author Item    More concepts for author
Geach, Peter T. Natural Deduction   Geach, Peter T.
Wessel, H. Natural Deduction   Wessel, H.

Ed. Martin Schulz, access date 2017-05-23