But even once you have a sense of what they say, and even if you understand it quite well, you still have to do a lot of detective work and take everything with a grain of salt. You can imagine if one, you can imagine if one, if there's a bunch of groups of people here and we get the history from this group, for some reason we're able to find what they wrote, well, it might not be completely unbiased. They might have a negative view of this group or that group. And so you have to take it with all the grain of salt. At the extreme form, they might have eliminated some of these groups and then only they were around to say what actually happened. You also have to be skeptical because you don't know whether these stories are actual accounts or whether someone just made it up to fit a worldview. You also have to keep in mind that these stories, whether they were transmitted written or orally, they're oftentimes retransmitted from generation to generation.