Hey There, I have been reading a lot of the prophecies in the Old Testament. One of my favorites is in Isaiah 53 where there was a beautiful prediction of the coming Messiah. One thing a debating atheist told me is that the earliest Old Testament copy we have is after Christ and that all the prophecies were put into the Old Testament later to make the Bible more believable. Is this even a plausible debate? Is it even remotely possible that all these prophecies were put into the Old Testament after the fact?