Ontological arguments are arguments, for the conclusion that God exists, from premises which are supposed to derive from some source other than observation of the world—e.g., from reason alone. 1 Gaunilo’s ‘Lost Island’ argument We saw in our discussion of Anselm that Anselm was trying to provide a reductio ad absurdum of the atheist’s position, by showing that the supposition that God does not exist in reality leads to an absurdity. 2.Then, it follows that it is possible that there exists a being greater than God (since there could be something just like God except that, unlike God, it exists in reality).
In contrast, the ontological argument relies on pure reasoning. In fact, many secular philosophers have conceded that the Modal Ontological Argument (the version of the argument under consideration in this article) holds up under even the … Answer: The ontological argument for the existence of God is one of the few arguments originating in logic rather than observation.

In the late-18th-century Critique of Pure Reason, Immanuel Kant provided the standard rebuttal to the classic ontological argument: the mere concept of what God is does not entail his existence. Teleological and cosmological arguments, for instance, demonstrate how the existence of God best explains apparent design in nature and the nature of causality, respectively. P rofessional philosophers commonly regard the Ontological Argument as the best single logical argument in favor of God’s existence. In other words, ontological arguments are arguments from what are typically alleged to be none but analytic, a priori and necessary premises to the conclusion that God exists.

Part 1: Apologetics for Everyone Part 2: The Cosmological Arguments.

Gaunilo, a monk who was a contemporary of St. Anselm, offered an early and influential reply to the ontological argument. ontological argument 1.Suppose: God (=the greatest being possible) does not exist in reality. While we may conceive of God as having the property of being all … A rebuttal of the ontological argument All This is another post I’m making trying to highlight a large flaw in specific, common types of arguments for the existence of gods.