 Rob, you've actually worked with digital twins. There is a bizarrely enormous yet subtle difference between digital modeling and digital twinning. The point at which it becomes a digital twin is when you start introducing real world sensors into the physical object. So you have a digital model that is running, and it can be as exact as you want it to be, but it's still just a model. So the second you put a sensor into that equation, now you've got a situation where you started out with the human brain's idea of what a circulatory system was, and you modeled that, and then you put sensors into the actual person, and now you're getting feedback in real time, or near real time, so that you can take that into account in your model, right? And so now you're getting an accurate portrayal of what's happened to that specific individual.