A given. The point is that for a Christian to believe in God, yet reject His Word regarding Satan (e.g. "And the Lord shewed me Jesus the high priest standing before the angel of the Lord: and Satan stood on his right hand to be his adversary. And the Lord said to Satan: The Lord rebuke thee, O Satan: and the Lord that chose Jerusalem rebuke thee: Is not this a brand plucked out of the fire? ") is a contradiction.
well, you can believe in a God who is NOT the God of the Bible. It won’t do you much good in the long run, but it is possible.
My point is that God/Satan in NOT a binary. If something is true of false, a true binary, it is either true or false. It can’t be both, and it can’t be neither.
This does not apply to God/Satan. It can be neither, it can be both, it can even be either, or depending on how you define things it can be God but not Satan, but not Satan but not God.
the point being that there are at least 3 possibilites, not two.