Why is it that every time the bible's truthfullness is called into question, the rebuttals inevitably includes quotes from the offending document?

As to why god would allow suffering, well, that falls under the idea of free choice. This should fly with all of you "there is no spoon" people. If there is a predetermined fate, then there is no choice. If there is choice, there is suffering.

But my question to the practicing christians out there. If we're to take the books as THE WORD, would the other works not included count also? Other diciples wrote of jesus, would they're words be any less true?