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2. Kuhn, T., The Structure of Scientific Revolutions, University of Chicago Press, Chicago, 1962.
3. Feyerabend, P., Against Method, New Left, London, 1975.
4. Laudan, L., Progress and its Problems: Towards a Theory of Scientific Growth, University of California Press, Berkeley, 1977.
5. Plato, Euthyphro, in Jowett, B. (trans.), Random House, New York, 1937, pp. 383?400.