Quá¹Âb al-Dën al-RÃÂzë al-TaḥtÃÂnë (d. 766 AH / 1365 CE) was a 14th-century Islamic philosopher, logician, jurist, and commentator in the post-Avicennan philosophical tradition. He played a significant role in refining logical and philosophical discourse, particularly in relation to issues such as universals, and was associated with the Shafi'i legal school.
His philosophical corpus includes major works in logic such as Taḥrër al-qawÃÂÿid al-maná¹Âiqiyya and LawÃÂmiÿ al-asrÃÂr, as well as philosophical commentaries like al-MuḥÃÂkamÃÂt bayna sharḥay al-IshÃÂrÃÂt.
He contributed significantly to the study of universals, particularly through critical engagement with AvicennaâÂÂs theory of the natural universal (al-kullë al-á¹Âabëÿë) the view that universal quiddity exists within particulars as a part of their essence.
His treatises such as RisÃÂla fë taḥqëq al-kulliyÃÂt and RisÃÂlat al-maÿmà «la fë al-taá¹£awwur wa-l-taá¹£dëq shaped later debates in predication, definition, and universal concepts.