When i was at conacademy, my rnd group worked on this lengthy project to try to have open ended activities for things. For instance, in history, if you want to learn to make an argument for what historical causation is, that's a pretty complex thing. It includes a sense of how important was this cause versus a different cause. And so if i were to ask you, what was the most important cause of world war one, that's something that, if you were to give that as a multiple choice question, it wouldn't teach you very much in terms of wisdom for historical causation. I mean, a typical question like that, not on the a p exam.