 You know, if you received a grade in class, but you don't know why you got that grade. And actually, many of us may have experienced this going through school, right? You know, you hear this like participation grade, and it's like, wait, I didn't know that was a grade or why the professor gave me this grade. So that does happen in human life as well. One of the points I make in the book is that as we turn towards algorithms and artificial intelligence, the speed and scale at which this can happen is somewhat unprecedented.