Karl Popper on the Problem of Induction

Karl Popper – The Logic of Scientific Discovery, 1934:

Now it is far from obvious, from a logical point of view, that we are justified in inferring universal statements from singular ones, no matter how numerous; for any conclusion drawn in this way may always turn out to be false: no matter how many instances of white swans we may have observed, this does not justify the conclusion that all swans are white.

Karl Popper: Wikipedia
(Photo: R. Lin)