Examination of the Criterion for the Self-evident Concepts in the View of Muslim thinkers

The criterion of how some concepts can be self-evident is one of the latest issues introduced in Epistomology. There is the question of why and how some concepts are self-evident, but others are not. As it were, what is the secret how some concepts are self-evident? As to this issue, Muslim thinkers have suggested their own views categorized into four theories: generality, simplicity, reduction to intuitive knowledge and differentiation. In what follows, the author has proposed the four above theories for his examination using the analytic-descriptive method. In the end and despite some objections, the differentiation theory is assumed as the sound theory. This theory suggests that because there are many different categories of self-evident concepts, each category has its own criterion different from that of other categories. Thus, there cannot be one single criterion.