Every age, every generation has its built in assumptions, that the world is flat, that the world is round etc. There are hundreds of hidden assumptions, things we take for granted, that may or may not be true. Of-course in the vast majority of cases historically, these things aren’t true. So presumably, if history is any guide, much about what we take for granted about the world simply isn’t true. But we’re locked into these precepts without even knowing it. That’s a paradigm.