We present the characteristics of the scientific method and examine its effect on clinical facts. Because the scientific technique involves both reduction of facts (details) and generalization, it results in dangerous deformations of the clinical situation. Statistical methods used indiscriminately, as in many contemporary scientific papers, result in many false alarms and invalid therapies. Because of these limitations, the scientific method is not suitable for analysis of the true therapeutic situation, but can be used to gather biologic background facts necessary for the interpretation of observations made in the therapeutic situation. It is pointed out that clinical experience is an ability to listen and observe that goes beyond science.