In this article, the social scientists be particularly aware of
focusing in social and political phenomena. The author begins the chapters with providing the definition of research methodology. Second, he classifies sources of knowledge. Then, he explains about the characteristic of a scientific approach, and presents the basic assumption underlying the scientific approach by examining informal fallacies in order to be more understanding the logic. Last, the author gives the list of answer to prevalent arguments against the possibility of the existence of a social science.