 In MWO, he defended induction in more detail by arguing that not every prediction is compatible with an evidence base, and that successive revision of one’s predictions in the light of new experience can’t help but make for more successful predictions (Lewis 1929, 367, 386). Nelson Goodman’s well known “grue” example (Goodman 1955) poses problems for the relevance of the first claim and the force of the second. At other times, Lewis simply followed Hans Reichenbach in claiming that we can be assured only that if any procedures will achieve success in prediction, inductive ones will, without clearly distinguishing that claim from any attempt at an analytic justification of induction.