Abstract The debates on Kulliyyāt I .1.ii of Ibn Sīnā’s Qānūn (“on the subjects medicine”) were initiated by Faḫr al-Dīn al-Rāzī and continued Afḍal al-Ḫūnaǧī, Naǧm al-Naḫǧawānī, Yaʿqūb ibn Ġanāʾim al-Sāmirī, Rafīʿ al-Ǧīlī, al-Nafīs, al-Quff al-Masīḥī. In his own commentary, entitled al-Tuḥfa al-saʿdiyya , Quṭb al-Šīrāzī preserved scrutinized predecessors’ commentaries, in order to offer what h...