A God is Intrinsically Impossible

I affirm the position that it is intrinsically impossible for a God to exist.Contention One: CauseThe laws of conservation of matter and energy clearly state that is impossible for matter and energy to be created from nothing or destroyed into nothing. [1][2] This of course means that anything currently existing within space-time must be composed of matter from something else, or converted from other energy. Now, since my definition of God has not been contested, we will be using it, including the part where we define God as having created the universe. The big bang, or any sort of beginning phenomena you care to imagine, would obviously require some type of energy. So God is a being that uses some kind of energy. Again, as we already know, energy does not come from nowhere. Obviously, since the only thing that could have come from nothing is nothing itself, we know that God is synonymous with nothing, or nonexistence. So God is intrinsically impossible.Contention Two: OmnipotenceOmnipotence has been defined as the ability to do literally everything, as this is even borne out by its roots, omni (all) potence (capability). [3] So we know that under the currently used and currently uncontested definition of God, God has teh ability to do anything. What this entails is a long string of paradoxes. For example, if God can do anything, then God must be able to think of something that He can't do. In which case, He wouldn't be able to do it, and wouldn't be omnipotent. God would have to be able to create a rock that weighed so much that he couldn't move it. If he can't create the rock, He isn't omnipotent. If he can create the rock, then He can't move it and isn't omnipotent. God would have to be able to create another omnipotent God that could beat Him in an armwrestle. Which would mean that since one of the two Gods couldn't beat the other in an armwrestle, one of them wouldn't be omnipotent. So omnipotence itself is intrinsically impossible, and so under our current and uncontested definition, God is intrinsically impossible.Contention Three: OmniscienceOmniscience is defined as knowing everything that can be known or having infinite knowledge. But knowing everything isn't really as testable as is needed. Firstly, how would a being know that they are omniscient? Well of course they know, after all, they know everything, including their own omniscience. Right? No, that's circular reasoning. Additionally, the being might think they know everything, and could be wrong. For example, if a God knew infinitely many things except one, say that there are aliens in Andromeda, then they wouldn't know that they didn't know there were aliens in Andromeda. And so they would go along thinking they knew everything and in reality not. In fact, the God would have an infinite number of things they didn't know, because they wouldn't know about the aliens, wouldn't know that they didn't know about the aliens, wouldn't know that they didn't know that they didn't know baout the aliens, etc. Which brings me to another point. What is knowledge? Is it a simple fact? If so, then even if you list off everything that God knows in an infinitely long list, you could still create a second list which just adds "God knows this:" in front of everything on the first list, creating a new list of things God doesn't know just as long as the first.Contention Four: Omniscience/OmnipotenceSo assume the following scenario. Some engineers get together and start designing a skyscraper. So God sees this (because he is omnipresent) and says to himself "I know that when the skyscraper is finished, I will have to chop it in half with a meteor." So ten years later the skyscraper is done. So God says to himself "Time to destroy it with meteors." Now God can do one of two things: destroy it with meteors, or not destroy it with meteors. If he decides that he will destroy it, then he was right when he said he knew what he was going to do. However, this means that God cannot not destroy the skyscraper. This refutes the fact of his own omnipotence. And after He destroys the skyscraper, he can't change his mind and undo it, because then he would be wrong when He said he knew he would destroy it. So what if He doesn't destroy it? Then this means that when He said that he knew He was going to destroy it that He was wrong, meaning that God isn't omniscient. So it is intrinsically impossible to be omnipotent and omniscient, meaning it is intrinsically impossible for a God to exist.These are my four main reasons why I believe that it is intrinsically impossible for a God as we have defined to exist.[1] wikipedia.org[2] wikipedia.org[3] dictionary.reference.com[4] dictionary.reference.com