[Mael]

Does omnipotence exist?

Yes, it does; as a word that has a meaning you can easily find in a dictionary. Although it has no physical implication, and is logically incoherent, it holds semantic value. God is merely that which means a being with attributes that include omnipotence, omniscience and omnipresence (and possibly omnibenevolence).

Whether he exists of not is irrelevant. The word God and it's meaning will haunt language and semantics till the end of time.

That's why oats was able to say what he said.