 The term taṣawwur is sometimes translated as ‘concept’, ‘conception,’ ‘conceptualization’, the grasping of an idea; taṣdīq is ‘assent’, ‘belief’, internal motion, ‘adhésion de l’esprit à un jugement, assentiment’ (Goichon 1939). Since Harry A. Wolfson wrote about taṣawwur and taṣdīq and suggested their Stoic origins (Wolfson 1943), considerable research has been done; I refer to the recent article of M. Forcada on Avempace for a detailed state of the art (Forcada 2014: 104).