Next thing you know he'll be puking up some gibberish about how the bible is "complete" as it is. The easiest way to defeat these kind of people in an argument is do not let the stray from whatever assertation they make, and then just pound away at whatever the assertation was. When they try to wander from it, remind them of what it was they said, and pound away more. Their goal is usually is to wander away from the assertation and somehow find a way to defeat whatever arguments you counter with, until they find a weak spot . . . . don't let them stray and they will have to concede the inevitable defeat coming their way. They like to claim that the universe cannot exist without a creator, but can never explain what created the creator, what created the creator of the creator and so on ad infinitum.

Is your period key broken?