In a career spanning sixty years, Sir Karl Popper made some of the most important contributions to the twentieth century discussion on science and rationality. This is a new collection of some of Popper's most important material on this subject.

In a career spanning sixty years, Sir Karl Popper made some of the most important contributions to the twentieth century discussion on science and rationality. This is a new collection of some of Popper's most important material on this subject.