Anselm's Ontological Argument (based on Graham Oppy's account) and its Comparison with Ibn Sina's Proof of Truthful(Seddighin)

Anselm's argument is one of the most controversial ontological arguments. According to Oppy،, this argument,, can fall into the category of modal,,meinonigian, or conceptual arguments. He believes that one of the sources of Anselm's thought in presenting the ontological argument is the ontological argument of Ibn Sina. In this study, we seek to answer these questions:Can the argument of Sinian Srddighin proof be considered as a kind of ontological argument? And is Anselm's argument an argument with two different interpretations, or are we confronted with two arguments? The purpose of this study is to compare Anselm's argument with Sina's proof. The findings of the study show that, from Oppy's point of view, Anselm has based only one argument on the existence of God in Proslogion's treatise.Although this argument is similar to the Siddighin proof in its a priori, inspired by the holy book and come to God through God, the essential difference between the two arguments is so great that these similarities can be overlooked. The ontoligicall argument begins with the " the concept of existence," while Seddighin proof is based on the " the truth of existence."And this is the beginning of the important differences between the two arguments.