Anselm draws this conclusion, "And assuredly, that than which nothing greater can be conceived, cannot exist in the understanding alone.' Which of these best summarizes his reasoning:

If the greatest conceivable being existed only as an idea, then there could be something greater than it.

We would not have the idea of the greatest conceivable being if it were not for God.

Only the fool can imagine God not existing.

If there could be something greater than the greatest conceivable being, then the greatest conceivable being exists only as an idea.

If the greatest conceivable being is only an idea, then it must be real as well.