He thought that if his argument was a good piece of reasoning, we would be able to prove the existence of many things that obviously do not exist. He used an example known as Gaunilo’s island. Saying that one can conceive of the greatest possible island in understanding. It may be the bluest waters, or the whitest sand, but that does not conclude that it is the Greatest island in existence. Anselm simply replied to Gaunilo by saying that his reasoning does not pertain to things like his island, but only to God, the greatest being possible. Some believe that Gaunilo’s argument fails because his island is not a