Theories of Truth and Learnable Languages
By far the most interesting and most successful recent theories of meaning have been truth-conditional. The paradigm of such theories is usually taken to be Tarski’s recursive characterization of truth for certain formal languages.1 Donald Davidson has both practiced truth-conditional theorizing in the semantics of natural languages and pleaded for the general importance of truth-conditional semantics.2 What is even more interesting and more unique to him, Davidson has sought to give a deeper motivation — perhaps a foundation — for truth-conditional semantics of the kind pioneered by Tarski. This deeper foundation Davidson has sought in the requirement of learnability of the language in question.3
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