Ontological arguments are often based in wordplay.
For example, Anselm's ontological argument for the existence of God sets the precedent that God is ''that than which nothing greater can be conceived'', essentially making God this entity that is the greatest of the greats because if you can think of something that is greater than God, then you're thinking of God.
Then, it states that God is a premise that exists only within the mind. However, only existing within the mind is inferior to existing in both the mind (in intellectu) and in reality (in re), and thus this conception of God is not ''that than which nothing greater can be conceived" because you can conceive a God that exists in both reality and in the mind. Thus, this new God that exists in reality and in the mind is ''that than which nothing greater can be conceived", and therefore God exists.
In another form;
It is a conceptual truth (or, so to speak, true by definition) that God is a being than which none greater can be imagined (that is, the greatest possible being that can be imagined).
God exists as an idea in the mind.
A being that exists as an idea in the mind and in reality is, other things being equal, greater than a being that exists only as an idea in the mind.
Thus, if God exists only as an idea in the mind, then we can imagine something that is greater than God (that is, a greatest possible being that does exist).
But we cannot imagine something that is greater than God (for it is a contradiction to suppose that we can imagine a being greater than the greatest possible being that can be imagined.)
Therefore, God exists.
NOTE: Admittedly, off-topic, but I felt compelled to put my philosophy education to use.









