Many people have tried to prove through many ways that God exists. Anselm used the ontological argument, proposing that if God could be thought of and perceived, then God has to exist. At the center of the ontological argument is the idea or concept of existence. The Ontological argument is a group of different philosophers arguments for the existence of God. "Ontological" means talking about being and so in the Philosophy case, that being is the existence or being of God. The ontological argument differs from other arguments in favor of God because of the fact that it is an a priori deductive argument, a priori means that a person arguing this can reach a certain conclu