抄録
Medical information based on natural languages such as "terrible fatigue" takes an important role for medical diagnosis. Though, such information suggests some of diseases, we have difficulty in the measurement of degree, the reliability of information and so on. Becuase, the medical information by natural language rises from the patients pain or feeling. So, moreover, the evaluation of this information is made by the doctor's criteria. So, information on natural language is subjective. The purpose of this paper is to make clear the fuzziness of medical information based on natural language and to propose a medical diagnostic system based on natural language using fuzzy inference.
