You [Lakatos] say that Sir K just messed up Hume’s problem. This is precisely what Schrödinger said, and I was there when he said it. It is a very interesting story. Karl wanted to dedicate the English edition of the Logic of Sci. etc. to Schrödinger. He had never given the book to Schrödinger to read and wanted to know, desperately, what he thought of it. Karl was sitting at the Böglerhof, Schrödinger was at another restaurant in Alpbach, in a very bad temper: “This Popper! There he gives me this confused book of his and wants me to consent to have my name on the first page. He says he does something about Hume’s problem – but he doesn’t, he just talks, and talks, and talks, and Hume’s problem is still unsolved”. So I tried to explain to him the difference between the problem of demarcation and the problem of induction. “Yes, yes,” he said, “I know, he solves the one BUT HE DOESN’T SOLVE THE OTHER and that is just what Hume said, that it couldn’t be solved…” etc. etc

Paul Feyerabend, Letter to Imre Lakatos, January 11, 1974, in Matteo Motterlini (ed.), For and Against Method: Including Lakatos’s Lectures on Scientific Method and the Lakatos-Feyerabend Correspondence, Chicago, 1999, p. 353