• But I shall let the little I have learnt go forth into the day in order that someone better than I may guess the truth, and in his work may prove and rebuke my error. At this I shall rejoice that I was yet a means whereby this truth has come to light.

    Introduction by Albrecht Durer (first lines) to Karl Popper "Conjectures and Refutations: The Growth of Scientific Knowledge", 1963.