Logical Consequence and Logical Expressions

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THEORIA. An International Journal for Theory, History and Foundations of Science, ISSN: 2171-679X, Vol: 18, Issue: 2, Page: 131-144

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Gómez-Torrente, Mario
Euskal Herriko Unibertsitatea / Universidad del País Vasco
article description
The pretheoretical notions of logical consequence and of a logical expression are linked in vague and complex ways to modal and pragmatic intuitions. I offer an introduction to the difficulties that these intuitions create when one attempts to give precise characterizations of those notions. Special attention is given to Tarski’s theories of logical consequence and logical constancy. I note that the Tarskian theory of logical consequence has fared better in the face of the difficulties than the Tarskian theory of logical constancy. Other theories of these notions are explained and criticized.