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[Will medicine find its identity in the new century? II. Methodology in medical research and the dichotomy of medicine].

Views on causality in medicine are today deeply influenced by philosophy of T. S. Kuhn (paradigm) and K. R. Popper (falsification of hypotheses). Contemporary epidemiological studies, which show the importance of social factors, move scientists in medical research to broaden their traditional positivistic reasoning with the deductive approach in the hypothesis formation, with using sociologic methods and to develop sociobiological research. From the point of falsification theory and alteration of scientific revolutions the causal way in the disease etiology in the permanent seek of the "final" link in the chain of risk factors. Medicine as a humanistic and social science developed dichotomically and asymmetrically. It is now divided and dysfunctional because it is not able to use fully its internal capacity to improve health of the whole population. Search for the identity of medicine is permanent and never ending historical process.