 They said, don't drop her on her head, which that was already one of my plans, so that wasn't really helpful. But it turns out that good parents, it basically becomes a genetic issue that the kid's genes determine their IQ, whereas bad parenting reduces the link from genes. So the implication is you can make your kid stupider by being a bad parent, particularly if you're abusive or something like that. You can't make your kid any smarter. All you can do is let the genes shine through.