It's a little more complicated than people make it out to be. For instance, when was it that the Torah became known as "the word of God?" What was it before that? When, where and why were the first eleven chapters of Genesis "written?" Was Abraham, Isaac and Jacob known before the time of Moses?
Because these are the relevant question that should be considered to answer the question the OP is asking. You can't use what was written to answer this question. That's like calibrating climate models using 20th century data to model the 20th century climate.
So, I'm sorry I can't give you a yes or no answer to your question. Because like I said, it's not how I would have gone about it.