Handbook of Philosophical Logic

Chapter 1. Deontic Logic and Changing Preferences (Johan van Benthem and Fenrong Liu).- Chapter 2. Homogeneous and heterogeneous logical proportions: An introduction (Henri Prade and Gilles Richard).- Chapter 3. The Formalization of Pratical Reasoning: Problems and Prospects (Richmond H. Thomason).- Chapter 4. Principles of Talmudic Logic (M. Abraham, D. M. Gabbay and U. Schild).

DOV M. GABBAY FRSC FAvH FRSA FBCS, Augustus De Morgan Professor of Logic (Emeritus), King's College London and Visiting Professor, University of Luxembourg. Dov Gabbay is one of the world's most active and influential researchers in logic. He has been active in the logic landscape for over 50 years. He authored / co-authored over five hundred and fifty research papers and over thirty research monographs.He has initiated several new and active research areas. He is editor of several international Journals, and over 50 Handbooks of Logic. Gabbay is Chairman and founder of several international conferences, Executive of the European Foundation of Logic Language and Information and President of the International IGPL Logic Group .Founder, Executive and Vice President of the International Federation of Computational Logic, (UK Charity, Number 1112512 ). He is one of the four founders and council member for many years of FoLLI, the Association of Logic, Language and Information. Now retired and a Life Member.

Franz Guenthner is a professor of Computational Linguistics at the Centre for Information and Language Processing (CIS) at the Ludwig-Maximilians-Universitaet (LMU) in Munich, Germany. His background is in philosophy and linguistics.Guenthner's research interests include computational linguistics, and has collaborated to the development of a number of online search platforms since 1996: AltaVista, Fast Search and Transfer (now purchased by Microsoft), RealNames, JobaNova, Exorbyte, and All The Web. He was a professor of General and Computational Linguistics at the University of Tübingen (1977-1989) before joining the LMU in 1990. His research interests include all areas of text processingand in particular the transformation of textual corpora in lexical and grammatical representations (i.e. computationally deployable electronic dictionaries and local grammars). He was also instrumental in the design and realization of a number of search engines, in