As a contemporary neo-Sadraian philosopher, Muhaqeq Isfahani has proposed his own account of the ontological argument for the existence of Allah. This account of the argument is unprecedented and has caught the attention of many contemporary thinkers. There have been proposed five accounts of this argument upon three pivots. First is the concept of necessary being as a mental concept. Second is the concept of necessary being so far as it denotes something beyond the concept. And third is the very (...) reality of necessary being existing by itself in the outside world. Each of the above accounts is open to some criticisms. Prof. Mahdi Ha’iri Yazdi has leveled four criticisms at that account of the argument such as counter-argument, begging the question, the confusion of categorical proposition with non-categorical one. The proponents of ontological argument have raised objections to Ha’iri’s criticisms. Most of those objections are not valid for they stem from the insufficient consideration of the fact that concepts such as “necessary being”, “God”, “partner of Creator” and the like are philosophical secondary intelligible. Accordingly, most of Prof. Ha’iri’s criticisms against Muhaqeq Ishafani are valid and thus the ontological argument fails to prove the existence of Allah. (shrink)