Epistemology is the branch of philosophy devoted to the study of the nature, origin, and limits of human knowledge. One of the questions of epistemology, for example, is to find a distinction between belief and opinion. Epistemology has been central to many of the philosophers' greatest ideas. It refers to the study of knowledge and things closely related to it; Such as justification, and the theory states that a person can have justified beliefs, how to know these beliefs and what justifies their belief, along with how to use that knowledge or justified beliefs in order to know other new things, and epistemology has been one of the areas of philosophy since ancient times.