 Other contested physical themes which Del Medigo discusses are movement and infinity. Del Medigo endorses Averroes’ position in the long commentary on the Physics, where the latter argues that, according to Aristotle, movement is predicated equivocally as it is found in different categories: substance (a thing moving from non-being into being) or quality (a white thing becoming black), to mention two examples (Montada 2013: 170). Regarding infinity, Del Medigo’s starting point is Aristotle’s assertion that every magnitude is potentially subject to infinite division, yet that this is not the case with addition, as yet every magnitude is not subject to infinite addition (Montada 2013: 172). In his Annotationes in librum De phisico auditu, Del Medigo sides with Averroes and argues against Walter Burley’s interpretation. Division, Del Medigo holds, is intrinsically related to matter. It thus follows that the type of potency associated with division is permanent, and hence can never be realized. In other words, division entails permanent potency, yet the type of potency associated with addition may be fully realized. Whereas division is associated with matter, addition is associated with form, and whereas division is inherently potential, addition is a process which may achieve completion. Therefore one cannot construe infinite addition, not even potentially (Del Medigo 1486: f. 140r-v; Montada 2013: 174–75).