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Problemistics - Problémistique - Problemistica
The Art & Craft of Problem Dealing
Validity
Features (Wesley C. Salmon)
Related concept : truth (Stephen F. Barker)
Related concept : truth (Wesley C. Salmon)
Rrelated concept : truth (Irving M. Copi)
[1973, Second Edition] Wesley C. Salmon, Logic, Prentice-Hall, Englewood Cliffs, New Jersey
“The validity of deductive arguments is determined by their logical form, not by the content of the statements comprising them.”
“Logic is concerned with the correctness of arguments, not with the truth or falsity of premises or conclusions.”
“To say that a deductive argument is ‘valid’ means that the premises are related to the conclusion in such a way that the conclusion must be true if the premises are true."
(Chapter 2, p. 18)
[1965, Fifth Edition 1989] Stephen F. Barker, The Elements of Logic, McGraw-Hill, New York
“Truth is a feature relating to the premises and conclusions of arguments. Validity is a feature of whole arguments themselves, having to do with how tightly the premises are connected with the conclusion.” (Chapter 1, p.14)
[1973, Second Edition] Wesley C. Salmon, Logic, Prentice-Hall, Englewood Cliffs, New Jersey
“Validity is a property of arguments, which are groups of statements, not of individual statements. Truth, on the other hand, is a property of individual statements, not of arguments.” (Chapter 2, p. 18)
[1982, Sixth Edition] Irving M. Copi, Introduction to Logic, Macmillan, New York,
“Truth and falsehood may be predicated of propositions [statements], but never of arguments. And the attributes of validity and invalidity can belong only to deductive arguments, never to propositions.”
(Chapter 1, p. 60)