2,400 years since Socrates and the smartest person in any room is the one who says, "I don't know." Of course we understand a lot more about our world today than we did then, but new data could always completely change the rules by which we understand how the world operates. None of that means we should stop trying to understand our world or that everything once believed to be true is wrong, rather we should recognize that what we know to be true today could be false tomorrow, or merely partially true.