That is the craziest thing I've ever heard. Whether or not the Bible, Quran or Torahy are 100% true, 50% true, or even 0% true historically, they all have value, as they all contain extremely valuable lessons. They all have valid instruction regarding living a good life. Some more than others, imho, but none are "worthless". And, it certainly is not an "all-or-nothing" type of thing. I am a Christian, and after many years of historical research, there are parts of the Bible that I trust as accurate, and other parts (like Paul's letters) that I question the validity of. Not only is there nothing wrong with that (assuming you are reasoning with clear, honorable intentions ... not just trying to make things easier on yourself), but I take pride in my reluctance to take anyone's word for anything on face value, but, instead, study the subject matter and history to come to my own conclusion.