I have read the argument. The exact wording of it is not relevant to me - I see all such arguments in the same category: if I (or the fool) can think of it (or understand the definition of it), then (some convoluted rigmarole about existence being superior to non-existence and much butchery of language) it exists.
Except that it doesn't. I have still not received one single delivery of poutine and fireball, despite holding in my mind a very firm notion that it would be even greater than the greatest conceivable thing.
So. Do you hold "if I can think of something, that means it is real" is what Anselm is saying?
Or not?