That's a big assumption.
"If God is omnipotent, he can create the stone. If He creates the stone and He cannot lift it, then he isn't omnipotent because there is something he can't do. If He can't create a stone he cannot lift, He is not omnipotent because He cannot create it."
Thats a smart question, let me simplify it . Aetheist " can GOd create a rock" muslim "sure" "can he make a big rock" "sure" "can he make a really big rock " " sure" " Can he make a rock SO big that NOTHING can move it. "ofcourse" . " Even he cant move it ? " " Well when i said that god can create a rock so big nothing can move it i was talking about the creation, u were reffering to a creation so i based that on other creations, so nothing in the creation can move it, but god isnt in the creation he is the creator.