In this fashion it is demonstrated that the existence of all...

In this fashion it is demonstrated that the existence of all possible existents (mumkinat) cannot be explained without assuming the existence of the Necessary Being. Although the argument used for proving the truth of this cannot be called demonstration per impossible (burhan khulf) in view of its indirect mode of inference, it resembles burhan khulf and hence it fails to provide completely satisfactory demonstration, for it does not explain the necessity of existence of the Necessary Being.

Ibn Sina in his al-'Isharat claims that he has succeeded in discovering "the Why?" (lima)…