In view of its exceptional suggestiveness, let us start with the work of T. S. Kuhn. Roughly speaking, Kuhn suggests that a mature science develops normally within a tradition through acceptance of a certain way of "doing science." The activity is, only in part, characterized by acceptance of a definite set of explicit theories, assumptions, and postulates as true and correct. Implicitly held views, presuppositions (àla Collingwood) contribute essentially to the tradition. Only a revolution, incited by persistent anomalies, makes the scientific community relinquish its loyalty to its tradition and take up a new way of "doing science."