“I contend that we are both atheists..."?

You don't understand the definition of God. By definition there can only be one God. Which one is omniscient? Which one is omnipotent? Which one is Omnipresent? Which one is Self existent creator of all without beginning or end? Since the one who existed before everything else created everything else no created thing can claim deity. So there is only one God He has revealed himself to us in three persons Father, Son and Holy Spirit. ( i'm Christian btw) :)