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Descartes' Meditations Ontological Argument Essay

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Descartes' Meditations Ontological Argument

Descartes's fifth Meditation argument for God's existence relies on an untenable notion that existence is a perfection and that it can be predicated of God. I shall first explain what Descartes's argument for God's existence is, and then present his argument in propositional form. I will then attempt to support the argument that existence is neither a perfection nor a predicate of God.

In our thoughts we apprehend ideas of things. These ideas may reside entirely within our thoughts or they may exist independent of our considerations of them (Descartes 143). Descartes argues that the idea of God is that He is infinite substance "[eternal, immutable], independent, all-knowing, …show more content…

Existence, therefore, should more properly be thought of as a prerequisite for perfection and not a perfection in and of itself. Descartes disagrees however, and in his reply to Gassendi he argues that existence is necessarily predicated of God because existence is a part of the true essence of any perfect being (Plantinga 49). For Descartes, it is not possible for us to possess the idea of a most perfect being if this being lacks the most important characteristic of existence. If God did not exist then He would not be the most perfect being, but we clearly have the idea of the most perfect being so therefore He must exist. The problem with this notion, however, is that Descartes begs the question by building into premise (2) the concept of a perfect being which has yet to be demonstrated. In order to demonstrate God's existence, Descartes should not assume, or presuppose, that which he is attempting to conclude. But by predicating the existence of God in (2) he has already concluded that which is later restated in the conclusion. In effect, the follower of Descartes's argument is tricked, for if he or she agrees with the foundational premises for the sake of the argument (that existence is predicated of a most perfect being), then there is no choice left but to conclude that God exists.

Further, predicating the existence of a most-perfect being based upon the attributes that this being is believed to possess fails to provide existence to

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