This article uses an analytical-descriptive method and aims to explain the Sadrian concept of the primacy of existence. It conducts a rational critique of the interpretation of identicalness of Sadrian concept of primacy of existence in four areas: conception, judgement, origin, and epistemic factors. It concludes that the claim itself in this interpretation, without considering its justification, leads to impossibility and contradiction. We refer to this as the examination of the conception of the interpretation of identicalness. The reasoning for this interpretation is also invalid and leads to impossibility. We refer to this as the examination of the judgement of the interpretation of identicalness. An important origin of the argument for this interpretation is the incorrect comparison of quiddity with existence, which is invalid.