Logic and Methods for Scientific Research of Sasang Constitution in Korean Medicine

Despite of registration in the international classification of disease(ICD)-11 chapter 26, Sasang constitutional medicine(SCM) is needed some solutions about scientific research methods and objective constitutional classification yet. For the scientific research, definition and its detailed explanation on each word is presented first, and then a requisite of experimental idea and research hypothesis with additional plurality hypothesis step by step. Then the logical basis of SCM is presented in a deductive way. And the similarity of the phenomena and concepts of constitution with the phenotypic traits, fitness, and embodied cognition modules in evolutionary biology and cognitive neuroscience are tried as a basis of logical extensions. The constitution is defined as following, the unique biological and psychological attributes of the human body as a adaptive response traits to maintain self-preservation and thermo-metabolic stability against external environmental changes. And using this definition and research hypothesis, logical format of the scientific research can be applied for abduction of constitution theory and then diagnostic variables and their measurable indices can be selected from the above natural science sources and clinical laboratory tests, genetic informatics etc