A Preface to Logic Author:Morris R. Cohen Chapter Titles: I. The Subject Matter of Formal Logic; II. Propositions and Uncompleted Symbols; III. Meaning and Implication; IV. Concepts and Twilight Zones; V. On the Logic of Fiction; VI. On Probability; VII. The Statistical View of Nature; VIII. Values, Norms and Science; IX. Logic and the World Order; Appendix: Two Masters of Logic