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From Debatepedia

Conjectures and Refutations: The Growth of Scientific Knowledge is a book written by philosopher Karl Popper. Published in 1936 by Routledge, this book is a collection of his lectures and papers that summarised his thoughts on the philosophy of science. Popper suggested that all scientific theories are by nature conjectures and inherently fallible, and that refutation to old theory is the paramount process of scientific discovery. Should any new theory survive more of such refutations, it would have a higher verisimilitude and therefore, Popper concluded, closer to truth.