al-Nazzam

Abu Ishaq Ibrahim ibn Sayyar al-Nazzam was an early theologian and poet of the Mu'tazila, a Basran school of speculative theology (kalam) that prized reasoned argument about God and the cosmos. He is traditionally placed in the late eighth and first half of the ninth century, though his dates are genuinely uncertain: birth is given as roughly 775 to 782 CE and death somewhere around 835 to 845 CE.

He grew up and was educated in Basra, then a hub of rational theology, and reference works report that he studied under the leading Mu'tazili Abu al-Hudhayl al-'Allaf — whom several sources describe as his maternal uncle — before breaking away to develop his own positions. He spent most of his working life in the Abbasid capital, Baghdad, where his pupils are said to have included the great prose stylist al-Jahiz.

Al-Nazzam is remembered for daring physical and theological ideas. He proposed the "leap" (tafra) to explain how a body could cross a distance made of infinitely many points, and a doctrine of "latency" (kumun), in which things God created are present in hidden form and emerge over time. He rejected the atomism favored by other theologians and, according to several reports, held the Qur'an's inimitability to lie in its content and in God "turning away" (sarfa) would-be imitators rather than in style alone. He drew openly on Greek natural philosophy and debated dualists such as the Manichaeans. These were contested positions, not settled doctrine.