In the late 1950s, with mind-brain identity theories no longer dominant in philosophy of mind scientific materialists turned to functionalism, the view that the identity of any mental state depends on its function in the cognitive system of which it is a part. The philosopher Hilary Putnam was one of the primary architects of functionalism and was the first to propose computational functionalism, which views the human mind as a computer or an information processor. But in the early 1970s Putnam began to have doubts about functionalism, and in his masterwork Representation and Reality (MIT Press, 1988) he advanced four powerful arguments against his own doctrine of computational functionalism. In Goedel, Putnam, and Functionalism, Jeff Buechner systematically examines Putnam's arguments against functionalism and contends that they are unsuccessful.