Kashf al-asrār

Al-Khūnajī's largest work on logic, a summa that may have been written as early as the 1220s. It holds that the subject matter of logic is conceptions and assents rather than Ibn Sīnā's secondary intelligibles, reads propositions in an 'essentialist' way and rejects several of the conversions accepted by Ibn Sīnā and Fakhr al-Dīn al-Rāzī; roughly 70% of the book is given to modal and hypothetical propositions and their conversions. Al-Kātibī taught it, wrote a large commentary on it and took over many of its non-Avicennan positions, as did al-Abharī, while al-Ṭūsī resisted them. Ibn Khaldūn names al-Khūnajī, after Fakhr al-Dīn al-Rāzī, as the man who reshaped the discipline. For a student it is the key to the new logic that lies behind the Shamsiyya and the later madrasa handbooks.

Draft · awaiting review by a qualified teacher