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John Philoponus


John Philoponus (/fˈlɒpənəs/; Ἰωάννης ὁ Φιλόπονος; c. 490 – c. 570), also known as John the Grammarian or John of Alexandria, was an Alexandrian philologist, Aristotelian commentator and Christian theologian, author of a considerable number of philosophical treatises and theological works.

A rigorous, sometimes polemical writer and an original thinker who was controversial in his own time, John Philoponus broke from the Aristotelian–Neoplatonic tradition, questioning methodology and eventually leading to empiricism in the natural sciences. He was one of the first to propose a "theory of impetus" reminiscent of the modern concept of inertia over Aristotelian dynamics.

Later in life Philoponus turned to Christian apologetics, arguing against the eternity of the world, a theory which formed the basis of pagan attack of the Christian doctrine of Creation. He also wrote on Christology, and was posthumously condemned as a heretic by the Imperial Church in 680–81 because of what was perceived of as a tritheistic interpretation of the Trinity.

His by-name ὁ Φιλόπονος translates as "lover of toil", i.e. "diligent", in reference to a Miaphysite confraternity in Alexandria, the philoponoi who were active in debating pagan (i.e. Neoplatonic) philosophers.

His posthumous condemnation limited the spread of his writing, but copies of his work did circulate in Greek or Latin versions in medieval Europe, influencing Bonaventure and Buridan. His work was also received in Arabic scholarly tradition, where he is known as Yaḥyā al-Naḥwī (i.e. "John the Grammarian"). His critique of Aristotle in the Physics commentary was a major influence on Giovanni Pico della Mirandola and Galileo Galilei, who cited Philoponus substantially in his works.


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