Theoretical and Observational Concepts; Realism or Non-Realism

Among the most basic discussions in epistemology are those related to ideas and concepts. In the present writing, we are trying to find out the features of theoretical concepts or terms as well as observational concepts. We are to find out whether the theoretical concepts are true concepts in principle or untrue ones like fairy tales and monsters or conventional concepts. In other words, must we choose realism or unrealism in the realm of theoretical concepts? What about the realm of observational concepts? And finally, what is the status of such concepts in the classification system of concepts and ideas? Undoubtedly, this discussion is among the most important and most basic epistemological discussions in the realm of concepts and ideas, through which the scientific propositions, laws and theories are organized. In the present study, we explore such a difficulty and pursue the related solution.