This transformation had been prepared, Husserl said, by the study of Leibniz and reflections on his distinction between verités de raison and verités de fait and on Hume’s ideas about knowledge about matters of fact and relations of ideas. Husserl had become keenly aware of the contrast between Hume’s distinction and Kant’s dis­tinction between analytic and synthetic judgments and this became crucial for the positions that he later adopted (Husserl, Introduction cit. 1975, 36).