Elucidating the Role of Truth-Expressions

The aim of this text is to elucidate certain aspects of the use of expressions such as “is true” and “it is true that” (henceforth “truth-expressions”) and, through this, some features of the concept of truth. It focuses on addressing the question of whether truth-expressions play the role of a predicate or an operator. The investigations pursued are intended to be grammatical—in Wittgenstein’s sense of the term. I begin with a short presentation of a widely held view about the role played by truth-expressions. I then contrast the Wittgensteinian conception of grammar with that of linguistics. I sketch Frege’s, Wittgenstein’s, Prior’s and Brandom’s central ideas regarding the issue under consideration. As a further step, I investigate the role of truth-expressions by examining several sentences in which they occur, and discuss objections to the proposed analysis. On my approach, truth expressions play the role of a predicate only when applied to sentences, and in all other cases function as operators. One advantage of such a position is that it enables a dissolution of the problem of truth-bearers: where truth-expressions are operators, the issue simply does not arise, and where they are predicates, it is sentences that are the truth-bearers.