al-Istidlal fi al-Tafsir Dirasa fi Manhaj al-Tabari
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- Tafsir Center for Quranic Studies
al-Istidlal fi al-Tafsir: Dirasa fi Manhaj al-Tabari (Inference in Exegesis: A Study of al-Tabari’s Methodology) is a contemporary scholarly work on the principles of Quranic exegesis (usul al-tafsir) by Nayif ibn Sa'id al-Zahrani, published by Tafsir Center for Quranic Studies (Markaz Tafsir) . The book examines the principles, categories, and methods of evidential reasoning (istidlal) employed by Ibn Jarir al-Tabari (d. 310 AH) to substantiate, evaluate, and prefer interpretations of the Quran in his landmark exegesis, Jami' al-Bayan 'an Ta'wil Ay al-Qur'an (The Comprehensive Clarification of the Interpretation of the Verses of the Quran) .
Purpose and Scope
The study aims to delineate the foundational rules of evidential reasoning in Quranic exegesis by examining al-Tabari’s critical methodology . It articulates the criteria governing valid and invalid proofs for exegetical meanings, classifies proofs into distinct ranks based on evidentiary weight, clarifies how conflicting interpretations are reconciled or weighed against one another, and extracts exegesis principles from early applied scholarly practice and neighboring disciplines such as jurisprudence (usul al-fiqh) and Arabic linguistics .
Structure and Contents
The book is organized into an introduction, a preliminary conceptual survey (tamhid), three main parts divided into thematic chapters, a conclusion, and specialized indexes :
- Preliminary Survey (al-Tamhid): Defines key terminology (methodology, istidlal, tafsir, al-Tabari, and Jami' al-Bayan) and analyzes the emergence, importance, and sources of evidential reasoning within the discipline of tafsir .
- Part One: Evidences of Meanings in al-Tabari's Exegesis: Explores al-Tabari’s attention to interpretive inference, distinguishing between vocabulary meanings (mufradat) and syntactic or composite structures (tarakib) . It identifies three operational modes of inference: proving and affirming meanings, choosing among competing acceptable meanings, and refuting invalid interpretations . It also details the overarching principles of evidential authority and categorizes proofs into transmission-based (naqli) and rational ('aqli) sources .
- Part Two: al-Tabari's Method of Evidential Reasoning: Outlines twelve overarching rules governing al-Tabari’s argumentation—such as the prohibition of speaking about the Quran without proof and the rule that any assertion lacking proof constitutes an unsubstantiated claim . It then analyzes his use of eight transmission-based proofs across eight chapters: the Quran, variant readings (qira'at), the prophetic Sunnah, consensus (ijma'), statements of early authorities (athar al-salaf), Arabic language, circumstantial contexts of revelation (ahwal al-nuzul), and Judeo-Christian reports (isra'iliyyat) .
- Part Three: Ordering, Harmonization, and Preference of Evidences: Analyzes how al-Tabari structured proofs in terms of validity, origin, and evidentiary force, as well as his methodology for harmonizing conflicting indications or establishing preponderance (tarjih) between them .
Methodology and Findings
The author gathered the empirical data through iterative readings of al-Tabari's entire commentary, extracting every instance in which al-Tabari offered an argument to support or reject an interpretation, while avoiding alterations to quoted passages and providing illustrative examples .
The study establishes that al-Tabari operated according to eleven distinct types of evidence, divided into two primary foundations: transmission-based proofs (consisting of eight types) and rational proofs (consisting of textual parallels [al-naza'ir], context [al-siyaq], and logical inferences [al-dalalat al-'aqliyya]) . The empirical survey documented 10,881 instances of evidential argumentation in Jami' al-Bayan, of which 9,295 (85.4%) relied on textual transmission and 1,586 (14.6%) relied on rational indications .
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