I really like this argument and may use variations of it in the future. Although I'll have to agree that they will back up their faith through the use of their 'holy' books. It's always the theist stonewall argument, any attempts to get them to talk about their faith outside the bible will result in tantrums or a complete disregard for the arguments foundation.
Personally I attribute this to an incapability to think outside of the circular answers they pick up from others of the same faith.
Personally I attribute this to an incapability to think outside of the circular answers they pick up from others of the same faith.