Ontological Argument Essay

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Explain the reasoning of the Ontological argument as a proof for the existence of God.
Ontological arguments, by their nature attempt to prove the existence of God using deductive reasoning to a point of logical necessity. Constructed as an a priori proof Anselm’s ontological argument works from a position of faith in an attempt to strengthen his belief in the existence of God. Anselm asks the question, ‘can what I know about God, be thought of as correct?’ However, the argument does, in some forms, attempt to prove the existence of God reductio ad absurdum. In this essay I shall follow the reasoning of Anselm alongside a discussion of theistic proofs.
Stephen Davis argues that a theistic proof must be ‘informally sound’, allowing arguments
He defined God as ‘That than which nothing greater can be conceived’ (TTWNGCBC). Arguably this definition is our best way of understanding of what God is. Even Aquinas, who stated God’s existence is beyond our comprehension, may argue that this definition holds truest to God’s existence, describing him as beyond anything than we can possibly imagine. From here, Anselm moves on to prove the existence of God based on this definition. There are two types of existence, he states, existence in intellectu (in the mind) and existence in re (in reality). The artist can conceive of a painting in intellectu before he makes his creation an actuality (in re). From here Anselm argues that existence in re is clearly greater than existence in intellectu. This seems relatively coherent. Surely, if someone proposed to me the possibility of merely conceiving of £1000 it would be greater to actually have it. Just as Anselm looks at the painter, it appears greater for the painting to actually exist in re than remaining in intellectu. Based on our understanding of God, therefore (TTWNGCBC), even ‘the fool’ (the atheist) can grasp the concept of a being greater than which nothing else can be imagined in intellectu. However, since existence in re is greater than purely existing in intellectu, it would be ‘damaging to God’s nature’, states Lockyer, to exist whereby he could have a
In On Behalf of the Fool Gaunilo argues that just because we can conceive of the perfect ‘something’ it doesn’t mean it actually exists. As a parody Ganuilo argues that the idea of a perfect island seems attractive but that doesn’t mean that somewhere in the world the island actually exists. Similarly, if I can imagine the perfect weekend, greater than which no greater weekened can be conceived, it doesn’t mean it actually exists. While this appears to be a valid criticism Anselm uses it to bolster his reasoning for the proof of the existence of God. While the island is relatable, Anselm’s ‘God’ is ineffable and as such requires no referent. Still though, we are left with the possibility of God not existing (based on on our understanding of the island). Therefore, Anselm introduces the idea of necessary being and contingent beings. We can all conceive of things that can not exist (such as human beings, life and everything within the observable universe) and we can conceive of things that cannot not exist (such as state of affairs and numbers). It is greater for something to exist whereby it cannot not exist. This idea of necessity drives Anselm’s argument to a state where God must exist otherwise it would be ‘damaging to his nature’ to have the possibility of contingent

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