“To my complete surprise, that exposure to out-of-date scientific theory and practice radically undermined some of my basic conceptions about the nature of science and the reasons for its special success.
Those conceptions were ones I had previously drawn partly from scientific training itself and partly from a long-standing avocational interest in the philosophy of science. Somehow, whatever their pedagogic utility and their abstract plausibility, those notions did not at all fit the enterprise that historical study displayed. Yet they were and are fundamental to many discussions of science, and their failures of verisimilitude therefore seemed thoroughly worth pursuing. The result was a drastic shift in my career plans, a shift from physics to history of science and then, gradually, from relatively straightforward historical problems back to the more philosophical concerns that had initially led me to history.”
The Structure of Scientific Revolutions (1962), Preface
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Thomas Kuhn 27
American historian, physicist and philosopher 1922–1996Related quotes
Robert A. Solo (1994) commented: "Curiously, and quite independently of the publication of the The Image, there did occur in the 1950s and in the decades that followed a revolutionary transformation of the social and behavioral sciences associated with the term structuralism, which hinged on the concept and study of the image (call it cognitive structure, or paradigm, or episteme, or ideology). This was the case in the work of Jean Piaget in psychology, of Thomas Kuhn and Michael Foucault in the history and philosophy of science, of Noam Chomsky in linguistics, of Claude Levi Strauss in anthropology, and others. Though The Image was the first and in my view by far the finest American structuralist essay, it had no visible impact on economics... The economist's image of his world is alas very difficult to penetrate and even more difficult to change."
Source: 1950s, The Image: Knowledge in Life and Society, 1956, p. 128

As quoted in Profile of Sir Alfred Ayer (June 1971) by Euro-Television, quoted in A.J. Ayer: A Life (1999), p. 2.
Source: A Long Search for Information (2004), p. 4.

Source: 1980s, Notes on an epistemology for living things, 1981, p.258

Ragnar Frisch. " A complete scheme for computing all direct and cross demand elasticities in a model with many sectors http://econ.ucdenver.edu/beckman/Research/readings/frisch-demand-econometrica.pdf." Econometrica 27.2 (1959), p. 178; Cited in: Chipman, John S. " http://www.sv.uio.no/econ/om/tall-og-fakta/nobelprisvinnere/ragnar-frisch/Chipman%20paper[1.pdf The contributions of Ragnar Frisch to economics and econometrics]." ECONOMETRIC SOCIETY MONOGRAPHS 31 (1998): 58-110.
1940-60s
Source: General System Theory (1968), 4. Advances in General Systems Theory, p. 100 cited in: Edward Goldsmith (1970-73/2013) Towards a Unified Science http://www.edwardgoldsmith.org/598/
Source: "The Population Ecology of Organizations," 1977, p. 946