Conceptology of Muthbit (Establishing) Principle

The Mujtahid (master jurist), after doubting in Ḥukm Taklīfī (defining law) and not finding ʼImārah (indication leading to a speculative reasoning), unavoidably performs practical principles to relieve confusion. Subjects which are the place of performance of practical principles may have with them inherent, implicant and attendant whether they are legal or non-legal or direct or indirect. In principles of Jurisprudence, the scope and validity of each of these cases is examined under the title of Muthbit Principle. Considering logical order, before discussing on validity this principle, one must first be introduced to the concept of Muthbit Principle and determine its scope as well. With a brief view at the provided definitions for Muthbit Principle by Usuli scholars, it can be clearly seen the essential difference between each of those definitions. Having used the analytical method, this study counted and criticized various definitions of Muthbit Principle. Finally, a comprehensive definition which can include all components of said principle has been provided. Muthbit Principle is a principle that, in order to achieve the legal ruling, seeks to prove inherent or non-legal intermediates, implicant or legal attendant which is arranged on legal and non-legal intermediates. So, legal intermediates which follow legal effects will also be a Muthbit Principle.