 It is often argued that these theses require some form of the correspondence theory of truth. (Putnam (1978, p. 18) notes, “Whatever else realists say, they typically say that they believe in a ‘correspondence theory of truth’.”) At least, they are supported by the kind of correspondence theory without facts discussed in section 3.1, such as Field’s proposal. Such a theory will provide an account of objective relations of reference and satisfaction, and show how these determine the truth or falsehood of what we say about the world. Field’s own approach (1972) to this problem seeks a physicalist explanation of reference. But realism is a more general idea than physicalism. Any theory that provides objective relations of reference and satisfaction, and builds up a theory of truth from them, would give a form of realism. (Making the objectivity of reference the key to realism is characteristic of work of Putnam, e.g., 1978.)