i don't know about the others. the idea of parentology is we live in a complex scientific technical economy, and so in today's world, there's not one size fits all approach to raising successful kids or well adapted kids. really you just kind of need to roll with the punches, but don't do just whatever comes to your mind like take your kids out on a pacific ocean when they are just recovering from an infection. really be guided by the science, read the science critically, and then try it out on your own kids, revise your hypothesis, involve them like it's a learning moment, and then move on and in every decision as you say there's a lot of tough calls, and we look to scientific evidence, but we need to understand how to interpret it and implement it ourselves. >> well, you talk about how important it is as a parent to be flexible. that's a difficult thing, i know, for many people. i'm not a parent yet, but that's something i am concerned i won't be as good as. when you put your kids through these experiments, was there ever a time where you wanted the rules to apply where you said, you know what, maybe we