عنوان مقاله [English]
The phenomenon of sharing is one of the most important obstacles to knowing the narrator, and later rijals have tried to eliminate it with various solutions, which are known as ways of distinguishing commonalities. The name of Ahmad ibn Muhammad is one of the most frequently used common titles used in the documents of some of my companions in Kafi. The purpose of the present study is to critique and evaluate the methods of distinguishing rijals and to present new and systematic solutions for the process of distinction centered on Ahmad ibn Muhammad. In this regard, all the possibilities in Ahmad ibn Muhammad without suffix have been identified in the 815 documents quoted by some of my companions, then the scope of commonality has decreased in terms of class and conditions of the document. Then the quotations of the namesakes of Ahmad ibn Muhammad were taken from 83 narrators. Next, the narrators who did not have a masterful relationship with any of Ahmad ibn Muhammad's namesakes or had a common or special masterful relationship are divided into three groups. It is considered impossible to distinguish the first category, but by using the information of rijali sources and documents of hadith books and analyzing statistical data, an attempt has been made to provide practical evidence for distinguishing the second category.