You can't substantiate anything to fr0d0s satisfaction. True to all practicing xtians with a knowledge of apologetics he will always find a non rational way to wriggle his way out of it.
There is nothing people will not maintain when they are slaves to superstition
http://chatpilot-godisamyth.blogspot.com/
http://chatpilot-godisamyth.blogspot.com/