Part 1 of a new short series where I am commenting on Karl Popper's lecture "On the sources of knowledge and of ignorance". This paper sets the scene for the link between objective knowledge and fallibilism - refuting, as it does so, the empiricism of the classic British tradition and the rationalism of the Continental Tradition. I make the case at one point that most modern intellectuals (I mention the Americans in particular - perhaps unfairly) blend both classic philosophies into an epistemology of "certainly true knowledge" which is evidence based ("empirical") and inerrant (because it is "rational"). In all cases these are "the truth is manifest" crowd and that can lead to authoritarianism. The Popperian tradition is to take both the virtues of empiricism and rationalism - and thus by the light of both evidence and reason come to objective knowledge: knowledge that solves a problem but could possibly be wrong.