This is an amazingly good read. The author pretty much describes in full all the requirements for a system / model that could help his son. (And which they have developed on an n=1 basis.) And it’s a complex system. Food, type of food, time, insuline (two types), body response times and curves / ratios, a measurement model. And then after admiring his technical writing I come away with a deep respect and empathy for what they are going through.