Add Yahoo as a preferred source to see more of our stories on Google. (Getty) Sir Karl Popper (1902–94) is certainly among the most influential philosophers of science in the 20th century, as well as ...

I began to discern the paradox lurking at the heart of Karl Popper's career when, prior to interviewing him in 1992, I asked other philosophers about him. Queries of this kind usually elicit dull, ...

The philosopher Karl Popper pointed out that most early practition­­ers of science were justificationists. They didn’t just seek out any old knowledge; they were on the hunt for justified knowledge.