Validity
978-613-0-33412-3
6130334125
76
2010-06-06
34.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The term validity in logic applies to arguments or statements. A logically valid argument is one where the conclusion follows from the premises. An invalid argument is where the conclusion does not follow from the premises. A deductive argument may be valid but not true. In other words, validity is a necessary condition for truth of a deductive syllogism but is not a sufficient condition. An argument is valid if and only if the truth of its premises entails the truth of its conclusion. It would be self-contradictory to affirm the premises and deny the conclusion. The corresponding conditional of a valid argument is a logical truth and the negation of its corresponding conditional is a contradiction. The conclusion is a logical consequence of its premises.
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