Along with Bertrand Russell, he was one of just two  philosophers in the tw
Along with Bertrand Russell, he was one of just two  philosophers in the twentieth century to be made a fellow of the  Royal Society. His first book, _Logik der Forschung_, focuses on  "the problem of induction" and "the problem of demarcation," while  his _The Open Society and its Enemies_ was a popular critique of  totalitarianism. FTP, name this Vienna-born philosopher of  science, the father of the principle of falsification.
Along with Bertrand Russell, he was one of just two  philosophers in the twentieth century to be made a fellow of the  Royal Society.
Karl {Popper}