Answer:
The third stage of Malcolm's ontological argument involves the concept of "necessary existence." In this stage, Malcolm argues that if we can conceive of a being that possesses all perfections then this being must exist necessarily. In other words, if a perfect being is even conceivable, it must exist because existence is a part of its perfection. Malcolm's argument is a variation of the ontological argument for the existence of God, which seeks to establish the existence of a necessary and perfect being based on the concept of God's perfection.
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