Ibrāhīm Quwayrā/Quwayr ī , Abū Isḥāq (flor. late 3rd/9th century), one of the earliest commentators of Aristotle’s logical works in Arabic. No precise details survive concerning his life or the dates of his birth or death, save for the fact that he was alive during the reign of the ʿAbbāsid caliph al-Muʿtaḍid bi’llāh (r. 279–289/892–902). His primary importance lies in his role in promoting the study of logic in the Islamic world.

According to al-Masʿūdī (p. 105), Quwayrā was one of the final links in the transmission of logic …