The “lost” Yaḥyā ibn ʿAdī treatises recently discovered in the Tehran codex Marwī 19 include a record of a philosophical debate instigated by the Ḥamdānid prince Sayf-al-Dawla. More precisely, Marwī 19 contains Yaḥyā’s adjudication of a dispute between an unnamed Opponent and Yaḥyā’s younger relative Ibrāhīm ibn ʿAdī (who also served as al-Fārābī’s assistant), along with Ibrāhīm's response to Yaḥyā’s adjudication, and Yaḥyā’s final word. At issue was a problem of Aristotelian exegesis: should “body” be understood as falling under the category of substance or under the category of quantity? The unnamed Opponent argues that body is a species of substance; Ibrāhīm argues that technically speaking, body is a species of quantity, and hence an accident; and Yaḥyā judges that body is a species of substance, though for very different reasons than the Opponent gives. For the first time, the Arabic text of this exchange is edited and translated into English. Also provided is an Introduction that sets the debate in historical context, and discusses in particular the possible influence of John Philoponus. The debate is interesting and important not only because of the philosophical ramifications of the issues under discussion, but because it constitutes evidence of dialectical practice among Arabic-speaking philosophers from the middle of the 10th century.

中文翻译：

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YAḤYĀ IBN ʿADĪ 和 IBRĀHĪM IBN ʿADĪ：关于身体是物质还是数量。介绍、编辑和翻译

最近在德黑兰手抄本 Marwī 19 中发现的“失传”的 Yaḥyā ibn ʿAdī 论文包括由 Ḥamdānid 王子 Sayf-al-Dawla 发起的一场哲学辩论的记录。更准确地说，Marwī 19 包含 Yaḥyā 对不知名对手和 Yaḥyā 的年轻亲戚 Ibrāhīm ibn ʿAdī（他也是 al-Fārābī 的助手）之间争端的裁决，以及 Ibrāhīm 对 Yaḥyā 裁决的回应，以及 Yaḥyā 的最后决定。争论的焦点是亚里士多德的解经问题：“身体”应该被理解为属于实体的范畴还是属于数量的范畴？未命名的反对者认为身体是一种物质；易卜拉欣认为，从技术上讲，身体是一种数量，因此是一种意外。Yaḥyā判断身体是一种物质，尽管出于与对手给出的完全不同的原因。此次交流的阿拉伯语文本首次被编辑并翻译成英文。还提供了一个介绍，将辩论置于历史背景下，并特别讨论了约翰·菲洛波努斯可能产生的影响。这场辩论很有趣且很重要，不仅因为所讨论问题的哲学后果，而且因为它构成了 10 世纪中叶讲阿拉伯语的哲学家之间辩证法实践的证据。