Article

An Example of the Relationship between Metaphysics and Logic: Genus (Jins) and Differentia (Fasl) as the Parts of Quiddity (Mahiyya) in Ibn Sina and Fakhr al-Din al-Razi’s Thought

Abstract

Beyond being a tool of science, logic is also a specific discipline in Islamic studies that reflects
scholars’ metaphysical and ontological assumptions. One feature that best reflects the perceptions of
scholars who use logic as a scientific tool is the parallelism between matter-form (mādda-ṣūra) and genus-
differentia (jins-faṣl). Genus-differentia are the reflections of the Avicennian matter-form theory in
epistemology. In this article, I examine how Ibn Sīnā approached the relationship between genus-differentia
and matter-form by accepting the matter-form ontology. Moreover, I analyze how Fakhr al-Dīn al-Rāzī, by
applying an atomic ontology, explained genus-differentia in contrast to the matter-form theory.

Keywords

Genus Differentia Matter Form Logic Ontology Metaphysics

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Sacide Demir, Phd Candidate, İstanbul Medeniyet University
DOI: dx.doi.org/10.12658/Nazariyat.6.1.M0091en
Page: 225-242
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