if you look at this guy, you say that you need 10,000 hours to develop any sort of expertise. So between both of us, we probably spend more than 10,000 hours now. Hopefully we have some level of at least understanding expertise. Yeah, also, yeah, from our side. Yeah. For everybody in the class, right? The other people in this class are potentially the person you'll find yourself coming back to and working with. When Chaffeak and I, we did not know each other when we first encountered some overlap in our interests and we just kept creating opportunities to exchange our thoughts and that sort of animish then gets added to the mix and now extends both of our ideas and our work and his own work. So everybody in the class should imagine that you, it's through these interactions with your colleagues that you shape and sharpen your ideas. So I think, thank you. Yeah. So for the class I think I have a challenge for you. So since you did not share much of your thoughts, maybe you're too shy. So think about the arsenic paper that you read. I want you to find out at least one whole. One thing that you found that this is really outrageously stupid. It's not going to work. I gave the same challenge to my students also. So there are few things that I have issues. I did not share those with you, but I will not tell you right now. But I want you to see really what, like Larry raised something very interesting here that if the institutional mechanism is not there, if the capacity is constant