The Ontological Arguement

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The Ontological Agurmtent is an a prior argument which seeks to prove the existance of God, based upon a number of premis. Thus it is based upon logic and reason and naturally it is also deductive. The premis' provided lead to a highly probable conculsion. 

One begins the OA with Anslem who defines God as "That than which nothing greater can be concieved". Anslem proposes that exstance is a predicate and God is the subject and then explains that even a fool can conceive of 'than than which nothing greater can be concives', however he explains that the fool would say that God does not exist in re, only in the mind. Anslem futhers his premis' by saying that God would be greater if he existed both in the mind and in reality, hence he concluses that the fool really is a fool, and that God, that than which nothing greater can be concived, exists. Anslems whole arugement of God is focused around greatness as a key quality of God

However, Descartes approaches the argument from a differnt perspective. Descartes focuses on perfection and explains that God must exist in order for him to be perfect. He descirbes God as "a supremley perfect being" and bases his agrument around the statement 'Cognito ergo sum' (I think therefore I am). His beginning premis is 'I exist', and from this he states that he, in his mind can conceiev of a supremley pefect being/God. However, as an imperfect being, the pefect being himslef must have cojured up the though in my mind, as I myeslf as impefect am unable to comprehend such things. Decartes concludes that God exists both in mind and reality, and that in both of these forms, God is perfect because perfection is a


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