Scrumbutt is a well-known joke in our world. Our team does scrum, but we don't have anything shippable at the end of a sprint. our team scrums, we do three-month sprints. We like to make fun of scrumbutt. But can't you imagine early Scrum projects being called waterfall but? Early Scum teams must have existed in waterfall organizations, but they were trying something new. I'm sure what they we're trying was laughed at and called Waterfall But. Picture their coworkers laughing as those early scrum team members said, we do waterfall, But we integrate weekly. Or we Do waterfall But We test all the time. What's new is often laughed at. A huge challenge is that we can't know in advance which new practices are going to work and which aren't. We have to try them and see what works. In doing so, we have approach each new practice as an experiment saying, I think this will be better than what we're doing now, but hey, could be wrong. Saying I could be wrong isn't nearly as hard as admitting after the fact I was wrong. In fact, my wife likes to tease me that I have a hard time admitting when I'm wrong about things, at least in our personal lives. Back in the 1990s, My wife and I used to watch a TV show called Mad About You. It starred Helen Hunt and Paul Reiser as a 30-something married couple living in New York. In one episode, the husband gets a chance to invest in a virtual reality company. But as an early stage investor, he gets to try out the product before he invests. So they show him putting on these virtual-reality goggles and these Virtual Reality gloves. And in this particular product, user gets the conjure up a Virtual reality in which to interact. Well, the virtual reality the husband conjures up is of himself rubbing sunscreen on a swimsuit model. And after that, he's ready to invest, except his wife needs to try out the product. You can see him getting nervous, because if that's the reality he conjured up, what is his life going to invent? Well they show her putting on the Virtual Reality goggles and the VR gloves, And the reality she conjures up is of her husband repeatedly saying things like, I was wrong. The vastness of my wrongness was staggering. My wife has that clip saved on YouTube and shows it to me any time she says I'm refusing to admit that I am wrong