Abu Sulayman Sijistani

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Abu Sulayman Muhammad Sijistani, (Persian: ابوسلیمان سجستانی‎) also called al-Mantiqi (the Logician) (c. 932 – c. 1000 CE), named for his origins in Sijistan or Sistan province in present-day Iran, became the leading Persian[1] philosopher of Islamic humanism in Baghdad.

Deeply religious, he regarded both religion and philosophy as valid and true; but separate, concerned with different issues, and proceeding by different means. He thus rejected the claims of the theologians employing Ilm al-Kalam to have built a theology "proved" by rationality and of the Brethren of Purity to offer a synthesis of philosophy and religion.

His best-known work is Siwān al-Ḥikma "Vessel of Wisdom", a history of philosophy from the beginning to his own time.


  1. ^ Frye, ed. by R.N. (1975). The Cambridge history of Iran (Repr. ed.). London: Cambridge U.P. ISBN 978-0-521-20093-6. During the second half of the 4th/ioth century the philosophical scene in Baghdad was dominated by a Persian originating from Sistan, Abu Sulaiman al-Sijistanl, entitled Mantiqi.CS1 maint: extra text: authors list (link)

Further reading

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