Philosophy Lexicon of Arguments

Equivalence: Relation between sentences. It exists if both sides have the same truth value, so that they are both true or both false.
Author Item Excerpt Meta data

Books on Amazon
Hoyningen-Huene II 131
Biconditional/HH: ↔ is a sign of metalogic - logical equivalence is a statement linking of the object language.
II 133
Equivalence/HH: weakening the identity of statements - equi statements are not in all respects the same, but only in a logical sense - both have always same truth values - equivalent formulas have the same inference sets - and they can be inferred from the same conditions.
Logic Texts
Me I Albert Menne Folgerichtig Denken Darmstadt 1988
HH II Hoyningen-Huene Formale Logik, Stuttgart 1998
Re III Stephen Read Philosophie der Logik Hamburg 1997
Sal IV Wesley C. Salmon Logik Stuttgart 1983
Sai V R.M.Sainsbury Paradoxien Stuttgart 2001

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Ed. Martin Schulz, access date 2017-05-26