the traditional philosophy of medicine for he did not, and still does not, consider this latter, traditional style of philosophizing on medicine a scientific endeavor, but "belles lettres". His international recognition came especially through his work on the logic and methodology of clinical reasoning, including artificial intelligence and fuzzy logic application in the theory of medical decision-making, in the theory of medical knowledge and in medical ethics. He is the founding editor of two international journals, first Metamed founded in 1977 (renamed Metamedicine later. Current title: Theoretical Medicine and Bioethics, published by Springer Verlag), and second, Artificial Intelligence in Medicine founded in 1989 (published by Elsevier). His extensive work includes the following innovative theories: a comprehensive theory of medicine presented in his monumental Handbook, theory of fuzzy biopolymers, the prototype resemblance theory of disease, the palimpsest theory of mind, and the theory of technoevolution and . Work Analytic philosophy of medicine Sadegh-Zadeh conceives analytic philosophy of medicine as philosophy of medicine in the analytic tradition of philosophizing, i.e., philosophy of medicine by means of logical and conceptual analysis with its primary fields of inquiry being: Philosophy of medical language, Medical praxiology, i.e., philosophy, methodology and logic of medical practice, Medical epistemology, Medical deontics, i.e., analysis of medical morality, obligations, and law, Medical logic, and Medical metaphysics.Seising R, Tabacchi ME (eds.), Fuzziness and Medicine: Philosophical Reflections and Application Systems in Health Care, A Companion Volume to Sadegh-Zadeh's Handbook of Analytic Philosophy of Medicine. Berlin: Springer, 2013. Philosophy of medical language Sadegh-Zadeh considers medical language an ill-structured and ill-kept extension of everyday language by adding technical terms such as "angina pectoris", "appendicitis", etc. Sadegh-Zadeh claims that most of its terms are imprecise and ambiguous because they are either undefined or ill-defined. Since it has a significant impact both on medical knowledge and medical decision-making, he devotes himself extensively to the analysis of its nature and of its syntax, semantics, and pragmatics. He demonstrates and analyzes what he claims to be the inherent vagueness of medical terms and constructs techniques for dealing with this principally ineliminable feature by means of fuzzy logic. To this end, he introduces a comprehensive methodology of medical, including fuzzy, concept formation. Inspired by Patrick Suppes's and Carl Gustav Hempel's works,Hempel CG, Fundamentals of Concept Formation in Empirical Science. Chicago: The University of Chicago Press, 1952. he bases this methodology on an explication and formalization of all methods of