I could explain to you how we find out things about the past, but I'm fairly certain you don't actually want to learn anything that doesn't fit your worldview.

While it's not intentional, I would like to commend you on endorsing the scientific process. We do make a lot of assumptions based on limited evidence, and it's worth having a fool accuse us of foolishness from time to time, just to keep us on our toes.

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