Studying the Possibility of Comparing the Legal Theory in Islamic law and the West law by Relying on Epistemological Principals

Theories are the basic basis of science. The study of theories is sometimes at the level of works and results from them, and sometimes through its formative foundations. In the a priori study, the attitude of research is based on the basis of theories of theories as available concepts or in other words, the paradigm of theory. Based on this method of research, each theory - regardless of the details of the theory or its title - specifically follows a certain epistemological and ontological level. This study tries to examine the theoretical and ontological points of theory by the way of a posteriori. Accordingly, two main legal systems, the legal system of the west with all the subsets, and the Islamic law system, would be examined in a paradigmatic perspective. In particular, the main basis on the production of theories of each of these two legal systems will show that the possibility of comparing these theories is the paradigm of adaptation in the ontological and epistemological bases of the theory in which theory is produced.