The research concluded that epistemology has a high ability to contain sciences as the philosophy of all sciences, that is, the epistemological researcher begins with sciences from the history of their origin and course, studying the emergence of scientific perceptions and their transformations, and studying their continuity and extinction, and this indicates that epistemology is not concerned with the laboratory description of scientific facts, but rather the history of relationships, perceptions, and interpretations that science is exposed to; It is a psychological analysis of knowledge and all sciences, not knowledge or science itself. Because together, science and knowledge require prior ignorance of their subject matter, while epistemology requires prior and deep knowledge.
 This means that epistemology is a scientific theory whose subject matter is science. It is not a science, but a research oriented towards science, and if it were a science, it would be permissible for it to study itself, and this is not the case. There is a difference between studying science and studying oneself, and when we say: epistemology of grammar. What we mean is the scientific theory that studies the science of grammar, and it is different from the science of grammar that studies linguistic structure.