Roy Weintraub wrote: > Think Friedman on assumptions, Samuelson on > operationalism, Becker on family sociology, Hayek on psychology, Keynes on > probability, etc. How much of our study of Friedman say should focus on > his contribution's importance among economists in contrast to his lack of > sophistication viewed from the perspective of philosophers of science? 'Keynes on probability'? At least one philosopher (Russell) regarded K as an expert in that field on the strength of his fellowship dissertation (later published.) A. M. C. Waterman