Any adequate analysis or (if I may use the term) rational reconstruction of the method of science must comprise the statement that the scientist qua scientist accepts or rejects hypotheses; and further that an analysis of that statement would reveal it to entail that the scientist qua scientist makes value judgments.
Richard Rudner (1922–1979), U.S. philosopher of science. repr. in Introductory Readings in the Philosophy of Science, pp. 231-237, eds. Klemke, Hollinger, and Kline (1953). Originally published in Philosophy of Science, XX, "The Scientist Qua Scientist Makes Value Judgments," (1953).
Denying a popular tenet of positivism and reintroducing into philosophy of science a theme originally emphasized by Max Weber.