 Avempace concluded his enquiry moving out of the rational and leaving many loose ends. He was a busy man. When he finished his treatise On the Conjunction of Man with Intellect he apologized for not having been able to produce a demonstrative argument, burhan, on the issue and uttered his hope that the addressee of the epistle would be able to grasp its sense and meaning (IB-CIM: 22–23; IB-coll-fakhry: 172–173; IB-coll-genequand: 203 §60). Still, the outlines of his system are visible.