So if we look at one of the questions that I'm going to put up on the wall, and there we have a question up on the wall. And I'm going to read that question to you right now. According to Karl Marx, history is the record of a one granting of more political liberties to all people, the struggle between classes and society, war and conflicts between national leaders and increasing prosperity brought about by industrialization. I'm going to give you two guessing strategies right now, and I want you to apply that to the question. One of them is you're not allowed to say percentage answers in history. And I usually say 80 to 100%. So what does 80 to 100% mean?