I think the crucial point of disagreement was made very clear in the point of the debate at which Andy asked Jeff (at about 43:30 in the YouTube video): "What is the foundation of your faith? Why do you believe what you believe?" Jeff, in his typical quick and confident manner, replied: "The Word of the Living God!" Andy apparently wasn't adequately prepared to reply to this answer and responded with a weak, "Ok...". (It is even worse if you are watching the YouTube video because he follows up with a shoulder shrug and a smirk...)
I wonder, if the solution of the Scriptures is mere myth, the fancy of “iron-age peasants” as certain atheistic thinkers are fond of saying, what better solution is there in which man should place his faith?