 But if you live to age 84, you are a bloody genius to have waited that long. And how in the world do you know any of that stuff, right? That's my first question. So you do. I mean, you can take some clues. What's your family longevity? What's your history at the time? What's your health history at the time that you're looking at? But then here are the common mistakes that I see people end up making. First of all.