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Definition of Karl Popper from the Oxford Advanced Learner's Dictionary

 

Karl Popper

 
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(1902-94) a British philosopher, born in Austria. He wrote mainly about science, and argued that scientific ideas cannot be proved to be true, so that the closest thing to a true idea is one that has not been proved false. His books include The Logic of Scientific Discovery (1934) and The Open Society and its Enemies (1945). He was made a knight in 1965.