Part I: The Evolution of the Problem. The Justification of Induction. Hume's problem. The inductivist solution. The pragmatic vindication. The dissolution of the problem. The Characterization of Induction. Goodman's new riddle and the justification of induction. A closer look at Goodman's new riddle. Part II: The Resolution of the Problem. An Account of Simplicity. Simplicity: raw. Simplicity: refined. The Explication of Induction. Induction as simplicity. Induction justified. Some Implications of Induction. Inductive logic and confirmation. The consilience of inductions. The resilience of induction. A logic of scientific discovery. Appendix: A measure of statistical simplicity. References. Name index. Subject index.