Kâtibî further modified Khûnajî's reading to limit propositions with essentialist subjects to those with self-consistent subjects. In the Shamsiyya, in consequence, the externalist and essentialist readings are taken to be of the same status, which is to say, all and only the inferences provable in one reading are provable in the other. On the conversions in question, Kâtibî held: 