Abstract
This study is an attempt toexamine the critiques of Mu‘tazilites in general and Rukn al-Dīn Abū Ṭāhir al- Ṭuraythīthī in particular, of “ta’yēen by naṣṣ”(appointment by text or direct proclamation) which has long been discussedwithin the intellectual history of Islam. The concept of ta’yēen by nass is a case which has been attemptedto be grounded on the basis of Qur’ān and Ḥadith. Although it is thought to bepeculiar to the Shiite circles, it has also been expressed in some Sunnischools as well. Despite the fact that it is generally discussed in regard tothe imamate of the fourth Caliph ‘Ali,some also argued that ta‘yēen by ṇass was to be the case for the imamateof Abū Bakr. Concerning this theory, Mu‘tazilalevelled a great number of essential critiques at the Shiites’ understanding ofmatter. Since it has been discussed in direct relation to the textual evidencesfrom the Qur’ān, a re-examination of the subject in the Qur’anic context is required. In this regard, themethodological approach of Mu‘tazilitescholar al-Ṭuraythīthī is an important component to take into consideration.Ṭāhir al- Ṭuraythīthīcriticizes the sects for their understandings of the notion of ta‘yēen by naṣṣ, in his prominent book “Mutashābihal-Qur’ān” inwhich he tries to understand the subject at stake within the boundaries of languageand reason. Moreover, he evaluates the assertions of both Imāmiyya and Bakriyyaand criticizes both sides relying on the contextual basis of Qur’ānic verses.