As I see it, facts come from a shared culture. So we have a definition of facts for school questions, a definition of facts for scientific studies, a definition

As I see it, facts come from a shared culture. So we have a definition of facts for school questions, a definition of facts for scientific studies, a definition of facts for the justice system, a definition of facts in narrative and artistic critique. But there's no zone in the brain that directly distinguishes facts from opinions or narratives. The brain has to recognize that other people exist, and those other people have beliefs. All of our culture is built on top of that, including our understanding of facts. If you were utterly alone, you would develop narratives about the world, but without external challenge there's no reason to believe that you would develop a conception of falsehood. The story of Adam and Eve in the Garden is kind of an echo of this. We are all individuals participating in culture.