@reasoning logic,
Fil has thought about it long and hard and he is confident of the quality of his thought. It doesn't mean he is right, just that along the way he has bypassed or abandoned much that is the result of poor or lazy thinking.
However, in this case he is too focused on semantics. Whether or not his definition of all-powerful is correct it hardly places a limit on God unless he believes God is limited by the adjectives humans use to describe him. I doubt he would be so foolish to believe this though, so I think he's just having fun.