Traditional rationality vs. a tradition of criticism: A criticism of Popper's theory of the objectivity of science

This essay points out that Popper's theory of the objectivity of science is ambiguous: it is not clear whether it provides a guarantee of correct evaluations of theories or only a means of uncovering errors in such evaluations. The latter approach seems to be a more natural extension of Popper's fallibilist theory and is needed if his learning theory is adopted. But this leads to serious problems for a fallibilist theory of science.