Disputed Hadith sciences in Sunni: background and the reasons of its emergence

The existence of Hadiths which were apparently incompatible, and also, a curse of Islamic rationalist against people of Hadith based on quoting paradoxical Hadiths against Divine law and intellect by them make scholars of Hadith write some special books include gathering news and solving the problem and removing paradox of traditions. This gathering news and solving the problem is possible in various ways such as to prefer a tradition on its incompatible one or to abrogating and abrogated. Although the works of these scholars of Hadith is not without error in the case of matching the traditions and removing paradox among them, it is viewed a great work in the realm of prophetical Hadith. Not only the most important background and the reasons of emergence and development of disputed Hadith science, but also the most important activities of Sunni scholars of Hadith will be illustrated in this paper by a descriptive-analytical method.