Investigating the four sources of jurisprudence in terms of Shi a and Sunnis (reason, consensus, Sunnah, and Qur an)

In jurisprudential and principled issues, the method of jurisprudence deduction is a problem that is posited between Shiite and Sunni, in which there are differences of opinion and has a significant effect on the sentences deduction method. The Shiite sees a particular issue as authenticity and Sunni believes in an issue against it or vice versa! The research is carried out with library method and as far as possible, it has been tried to use reliable sources, such as al-Kafi, and al-Mahasen and Ajvad al-Taqrirat. In these sources of jurisprudence, the most important of them are Qur’an, Sunnah, reason and consensus. In each of these discussions, I try to cover each one at least briefly to the point where the word does not go out of boredom. In this paper, the authority of the Qur’an is addressed, albeit through rational and narrative reasons. In some cases, I have not found reason except thought and reason for research hypotheses. In this paper, the authenticity of the Sunnah and the reasons to prove infallibility will be address. Also the Sunni view of the Sunnah of the Companions and the definition of the Companions and rejection of them is also brought. In the discussion of reason, I have also discussed it very briefly and on the consensus, there is also a very beautiful debate about the authority of consensus either independently or through other resources that I refer to it in the text.