*Geisler:* Right! There's a big difference between the two systems. The answer to the question of truth is of eternal importance. If there's a substantial difference between the two systems -- and if your eternal soul depends on a correct choice of one system or the other -- then it behooves everyone to examine seriously all the evidence and make a truly informed decision. We can't just say, "Well, I believe it, I was taught it, I was reared that way." The question is, _Which one is true?_ If Islam is true, Christianity is false. If Christianity is true, Islam...