Arabic Sciences and Philosophy

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Arabic Sciences and Philosophy (2007), 17:1:57-80 Cambridge University Press
Copyright © 2007 Cambridge University Press
doi:10.1017/S0957423907000367

IN DEFENCE OF THE SOVEREIGNTY OF PHILOSOPHY: AL-BAGHDADI'S CRITIQUE OF IBN AL-HAYTHAM'S GEOMETRISATION OF PLACE 1


NADER  EL-BIZRI  a1
a1 Department of History and Philosophy of Science, University of Cambridge, Free School Lane, Cambridge CB2 3RH, United Kingdom

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Abstract

This paper investigates the objections that were raised by the philosopher ‘Abd al-La[tdotu ]if al-Baghdadi (d. ca. 1231 CE) against al-[Hdotu ]asan ibn al-Haytham’s (Alhazen; d. after 1041 CE) geometrisation of place. In this line of enquiry, I contrast the philosophical propositions that were advanced by al-Baghdadi in his tract: Fi al-Radd ‘ala Ibn al-Haytham fi al-makan (A refutation of Ibn al-Haytham’s place), with the geometrical demonstrations that Ibn al-Haytham presented in his groundbreaking treatise: Qawl fi al-Makan (Discourse on place). In examining the particulars of al-Baghdadi’s fragile defence of Aristotle’s definition of topos as delineated in Book IV of the Physics, which was rejected on mathematical grounds by Ibn al-Haytham, a special attention is also given to highlighting the systemic distinctions between the entities that are studied within the speculative physical doctrines of common sense and immediate experience, and the postulated ‘objects’ of scientific and mathematical research.

(Published Online February 12 2007)



Footnotes

1 An earlier concise version of this paper was presented on 18 February 2006 in Florence, under the title: ‘The physical or the mathematical? interrogating al-Baghdadi's critique of Ibn al-Haytham's geometrisation of place’, as part of the Colloque de la Société Internationale d'Histoire des Sciences et des Philosophies Arabes et Islamiques (Circulation des savoirs autour de la Méditerranée, IXe–XVIe siècles), which was held in association with the University of Florence. This text will be published as part of the Proceedings of the Colloquium (Les Actes du Colloque), under the editorship of Graziella Federici Vescovini (Florence).



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