Abstract

Ḥanafī jurist Burhān al-Dīn al-Nasafī is one of the most prominent names in the history of the ʿilm al-naẓar’ particularly due to his seminal work entitled al-Fuṣūl. We have located a manuscript which we will call an Opponent-al-Fuṣūl written by a Shāfiʿī scholar. This manuscript is titled al-Risāla fī qawāʿid ʿilm al-naẓar and it highlights the importance of al-Nasafī’s al-Fuṣūl. The scribe of the manuscript attributes this Opponent-al-Fuṣūl to the famous logician Najm al-Dīn al-Kātibī. Although no mention of such a book belonging to al-Kātibī has been discovered thus far, in this article we will try to demonstrate that the book does indeed belong to him. In addition, we will undertake a comparison of both works, al-Fuṣūl and the Opponent-al-Fuṣūl, with a particular focus on the concepts of talāzum, tanāfī and dawarān. A critical edition of the Opponent-al-Fuṣūl is appended to the article.