Kitāb muḫtaṣar waǧīz fī l-usṭuqussāt § 1, 1 p. 63, l. 6ff. Bos-Langermann: inna Arisṭūṭālīsa ḥadda l-usṭuqussa fī kitābihi l-mawsūmi bi-Kitābi s-samāʾi bi-an qāla: al-usṭuqussu huwa š-šayʾu llaḏī minhu {mā}3 yatakawwanu {mā huwa lahū usṭuqussun} 〈š-šayʾu〉 kawnan awwaliyyan wa-huwa mawǧūdun fī l-mukawwani immā bi-l-quwwati wa-immā bi-l-fiʿli. wa-ammā fī kitābihī fī-Mā baʿda ṭ-ṭabīʿiyyāti (!) fa-innahū ḫaṣṣa6 l-qawla bi-an qāla innahū mawǧūdun fī l-mukawwani bi-l-quwwati lā bi-l-fi ʿli. wa-ʿanā bi-qawlihi “llaḏī yakūnu minhu š-šayʾu kawnan awwaliyyan” absaṭa mā yakūnu l-mukawwanu lahū ay {awwal (...) kawn} aṣġara aǧzāʾi9 l-mukawwani. (shrink)

The Arabic text of Boethus fr. 44 Rashed has, pace Rashed, a parallel in a Greek scholium to Galen's De elementis ex Hippocratis sententia. The scholium occurs in the sets of scholia to De elem. in Paris BNF suppl. gr. 634 and in El Escorial Φ.II.15. The former set was edited by G. Helmreich in Handschriftliche Studien zu Galen, vol. I. The relevant passage occurs in Π fol. 21 r ult. – v 3 and in Σ fol. 136 r 7-11. (...) The polysyllogism ascribed to Boethus reads: τὸ ὅμοιον ὑπὸ τοῦ ὁμοίου γινώσκεται. ἡ αἴσθησις τὰ στοιχεῖα γινώσκει. ἡ αἴσθησις ἄρα ὁμοία τοῖς στοιχείοις … ἡ αἴσθησις ὁμοία τοῖς στοιχείοις. τὸ ὅμοιον ἐκ τοῦ ὁμοίου [γινώσκεται]. ἡ αἴσθησις ἄρα ἐκ τῶν στοιχείων [γινώσκεται]. (shrink)