Abu al-Husayn al-Basri

Abu'l-Husayn al-Basri (c. 980–1044 CE) was a Mu'tazilite jurist, physician and theologian. He wrote al-Mu'tamad fi Usul al-Fiqh (The Canon of the Foundations of Jurisprudence), a major source of influence in informing the foundations of Islamic jurisprudence until Fakhr al-Din al-Razi's al-Mahsul fi 'Ilm al-Usul (The Compilation of the Fundamentals of the Legal Sciences).^[3]

Abu'l-Husayn al-Basri
Personal life
Born	370 H (980 CE)
Died	436 H (1044 CE)
Era	Islamic golden age
Main interest(s)	Usul, Medicine
Notable work(s)	al-Mu'tamad fi Usul al-Fiqh
Occupation	Scholar of Islam
Religious life
Religion	Islam
Denomination	Mu'tazila
Jurisprudence	Hanafi[1][2]
Muslim leader
Influenced by Wasil ibn Ata, Abu al-Hudhayl al-'Allaf
Influenced Ibn al-Malāḥimī

He was a physician as well as a disciple of the Mu'tazilite judge Abd al-Jabbar in Rey. He challenged some of his master's teachings and eventually compiled a huge (two volumes; 1500 pages) critical review of the arguments and proofs used in Islamic scholastic theology. This, he summarised in al-Mu'tamad and included a critique of the qualifications of a legist. His works were generally handed down among students of medicine, and it was a century before his teachings were revived and espoused by the Mu'tazili scholar Ibn al-Malahimi in Khorezm in Central Asia, where they gained recognition as a school of Mu'tazili theology.^[4]