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Karl Popper was born in Vienna, Austria.
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Popper began his academic studies at the University of Vienna in 1918, and he focused on both mathematics and theoretical physics. https://www.iep.utm.edu/pop-sci/
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In 1928, he received a PhD in Philosophy. His dissertation, On the Problem of Method in the Psychology of Thinking, dealt primarily with the psychology of thought and discovery. Popper later reported that it was while writing this dissertation that he came to recognize “the priority of the study of logic over the study of subjective thought processes” (1976, p. 86), a sentiment that would be a primary focus in his more mature work in the philosophy of science. https://www.iep.utm.edu/pop-sci/
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In 1935, Popper published Logik der Forschung (The Logic of Research), his first major work in the philosophy of science. In this book Popper arguing that science should adopt a methodology based on falsifiability, because no number of experiments can ever prove a theory, but a reproducible experiment or observation can refute one. https://www.iep.utm.edu/pop-sci/
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His major works on the philosophy of science from this period include the articles that would eventually make up The Poverty of Historicism (1957) https://www.iep.utm.edu/pop-sci/
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His major works from this period include “The Propensity Interpretation of Probability” (1959) https://www.iep.utm.edu/pop-sci/
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Conjectures and Refutations (1963) https://www.iep.utm.edu/pop-sci/
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In The Philosophy of Karl Popper (1974),
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Unended Quest (1976) https://www.iep.utm.edu/pop-sci/
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Karl Popper died