The Concept of Supreme Perfection: Some Arguments for God’s Existence
The concept of a supremely perfect being is, in part, the concept of a person who has all those properties which are such that it is better than not that a person jointly possesses them. Wisdom and power are examples. (I say ‘jointly’ because, for example, power without wisdom is not a perfection.)
The concept of existence is the concept of such a property.
So, it is a conceptual truth that a supremely perfect being possesses the property of existence.
Hence, a supremely perfect being exists.
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