User talk:Philogo/Sandbox Argument (Logic)

"This article is about arguments in logic." This make clear that we are not writing about the the word argument in its many other senses
 * 1) Commentrary

In logic, an argument is a set of statements known as the premises, and another statement known as the conclusion in which it is asserted that the truth of the conclusion follows from (is entailed by) the premisses. A valid argument is one in which the premises cannot be true and the conclusion false. A sound argument is a valid argument with true premises (see also Validity, Soundness, true)"'

This introduces the key concepts of statement, truth, falsity,validity and entailment in one go. --Philogo 14:12, 2 February 2007 (UTC) "A proof is a demonstration that an argument is valid (see Proof procedure). Note statements are either true or false (not valid or invalid); arguments are valid, invalid sound or unsound (not true or false). "

This introduces the concepts of proof and proof procedures --Philogo 14:12, 2 February 2007 (UTC) see
 * 1) corresponding conditional