The Extensionality and Determination Problems

Ernie Lepore and Kirk Ludwig

in Donald Davidson

Published in print March 2005 | ISBN: 9780199251346
Published online July 2005 | e-ISBN: 9780191602634 | DOI:
 The Extensionality and Determination Problems

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Discusses the extensionality and determination problems for truth-theoretic semantics. The extensionality problem is how to impose a constraint on a truth theory that guarantees that it meets Tarski’s Convention T. The determination problem is the problem of specifying for a theory that meets Tarski’s Convention T which theorems can be used to interpret the sentences of the object language. Argues that nothing the theory states can solve the extensionality problem, but that one can state a condition on the theory that will solve the problem, and that the determination problem can be solved by specifying a canonical proof procedure for the theory.

Keywords: canonical proof; intensional contexts; determination problem; extensionality problem

Chapter.  5172 words. 

Subjects: Philosophy

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