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Roosevelt University - FALL (Aug 2010) | ||
Section 01 | ||
 | An Introduction to Logic (2nd Edition) by Morris Raphael Cohen, Ernest Nagel, John Corcoran (Editor) Paperback, 288 Pages, Published 1993 ISBN-10: 0-87220-144-9 / 0872201449 ISBN-13: 978-0-87220-144-6 / 9780872201446 Notice that the concepts "number", "zero", and "successor" are the primitive (or undefined) concepts of this A-system, while the three propositions are the axioms (or undemonstrated propositions). Now let us remove the meaningful ("constant") words 'number', 'zero', and 'successor' from the three | |