Abstract
This paper addresses discussions in post-Avicennan Arabic logic on various characterizations of metathetic propositions and their status vis-à-vis the existential import condition by focusing on the ar- guments made by Fakhr al-Dīn al-Rāzī (d. 606/1210) and the counter-arguments by Quṭb al-Dīn al-Rāzī al-Taḥtānī (d. 766/1365), both of whom established their positions in a framework drawn by Avicenna (Ibn Sīnā, d. 428/1037), the most prominent figure in the tradition of classical Arabic logic. In his logic texts, Avicenna thoroughly discusses the problem of the existential import in metathetic propositions (ma‘dūla), and seems to have presumed the existential import to be a truth-condition for affirmative propositions, and therefore, for affirmative metathetic propositions as well. For Avicenna, in other words, an affirmative metathetic proposition presumes its subject-terms’s possibly existent referent(s). However, the theologi- an-philosopher Fakhr al-Dīn al-Rāzī, who lived about a century and half after Avicenna, criticized his views on metathetic propositions and their existential import among other things, thereby igniting a wave of debates in the tradition, in which Quṭb al-Dīn al-Taḥtānī participated in the following century. By stud- ying this contained problem, this paper seeks to address a wider scholarly concern regarding the vitality of post-classical Arabic logic, and to establish that this period witnessed the flourishing of philosophical debate among Arabic logicians.
Keywords
Arabic logic Avicennan logic existential import metathetic propositions Fakhr al-Dīn al-Rāzī Quṭb al-Dīn al-Rāzī al-TaḥtānīShare
Details
- Authors: Yusuf Daşdemir, Dr., Jyväskylä University
- DOI: dx.doi.org/10.12658/Nazariyat.5.2.M0075en
- Year: 2019 (November) / Volume: 5 / Issue: 2
- Page: 81-118
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