Modal Logic An Introduction [Paperback]

A textbook, with exercises, on modal logic for readers already acquainted with the elements of formal logic.An introductory textbook on modal logic the logic of necessity and possibility.An introductory textbook on modal logic the logic of necessity and possibility.A textbook on modal logic, intended for readers already acquainted with the elements of formal logic, containing nearly 500 exercises. Brian F. Chellas provides a systematic introduction to the principal ideas and results in contemporary treatments of modality, including theorems on completeness and decidability. Illustrative chapters focus on deontic logic and conditionality. Modality is a rapidly expanding branch of logic, and familiarity with the subject is now regarded as a necessary part of every philosopher's technical equipment. Chellas here offers an up-to-date and reliable guide essential for the student.Contents; Preface; Part I: 1. Introduction; 2. Logical preliminaries; Part II: 3. Standard models for modal logics: 4. Normal systems of modal logic; 5. Determination and decidability for normal systems; 6. Deontic logic; Part III: 7. Minimal models for modal logics; 8. Classical systems of modal logic; 9. Determination and decidability for classical systems; 10. Conditional logic; Select bibliography; Index of symbols; Index of schemas, rules, and systems, Index of subjects.