Plato's Forms

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hich argues from a definition of God’s being to his existence, is the first type of argument we are going to examine. Since this argument was founded by Saint Anslem, we will be examining his writings. Saint Anslem starts by defining God as an all-perfect being, or rather as a being containing all conceivable perfections. Now if in addition of possessing all conceivable perfections this being did not possess existence, it would then be considered less perfect from a being that does exist. Since by definition God is all-perfect, and a being that does not exist is less perfect than one that did, it must be deemed that God exists. As one can see, Anslem explains God’s existence just by utilizing our concept of God as an all-perfect being. Simply put, the definition of God guarantees his existence just as the definition of a triangle guarantees that all triangles have three sides. This argument is a hard one to follow due to the fact that it utilizes Reductio Ad Abusdum form. This is when you support your conclusion by showing that the negation of the said conclusion will lead to a logical paradox.
Numerous Philosophers, Immanuel Kant being one, have refuted Saint Anslems assertion. Kant’s main objection is that the argument rests on the idea that existence is a quality or property. He asserts that the word “exist” has a different meaning from property-words such as “green”, or “pleased”. He then goes on to state that only characteristics or qualities can clarify or describe a concept, and since existence is neither it cannot be utilized in the argument. Kant then points out that the concept of God existing cannot be derived from the definition of him being all perfect, just as the concept of a leprechaun or unicorn’s existence cannot be derived from it’s definition.
Another problem with the Ontological Argument is the belief that existence is a real predicate. A predicate is something that adds some type of descri...