Investigating the Effect of Some Structural Deficiencies on the Validity of the Book of Tahzib Al Ahkam

The book of Tahzib Al Ahkam written by Sheikh Tusi, an encyclopedia of Shiite jurisprudence, is among the Shi'ite Four Books. The existence of some deficiencies such as distortion, additions, removals and so on had led to the emergence of different and sometimes contradictory views on the credibility of this book, to the extent that some scholars according to these shortcomings find this book invalid. This essay, using a library method and a descriptive-analytical method, examines these issues and their impact on the validity of this book.The findings of this research show that some of the weak narrations have been written in light of the motivation for writing this book, and while accepting the existence of some shortcomings, many of them were based on the style of writing and mistakes of the ascribes. Regarding the works related to the book and the works written for the purpose of eliminating such bugs, we can say: The book is usable and credible for specialists.