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This paper was read at the IV International Congress for Logic, Methodology and Philosophy of Science, Bucharest, 1971. Research for this paper was supported by a Grant from the National Science Foundation.
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Lehrer, K. Evidence and conceptual change. Philosophia 2, 273–281 (1972). https://doi.org/10.1007/BF02381589
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DOI: https://doi.org/10.1007/BF02381589