The aim of this brief essay is to present some conjectures as to how Hume might have criticized certain central epistemological doctrines of Kant.¹ By a natural extension of this theme I shall also raise a few questions concerning Karl Popper's views on induction and his critique of the empiricist meaning criterion. I do this in the spirit of my very great admiration for Popper's work and his friendship, which I cherish sincerely. If I have misunderstood his basic outlook, I hope that he will set me right in future discussions.