Yes, it was a causative claim:
"Interesting article in (Atlantic?) about the relation of high lead levels in environ. and the crime levels that follow in about 20 years. Not proof, and no proof is claimed, and the author has studied quite a few regions, including NYC, where the statistics for both problems are accurate. Mayor G. got a lot of credit for reducing crime, but it might have been due more to the reduction of lead in gasoline. "
At least 3 others here thought the same thing. A claim that makes no sense, because Chicago has a high crime rate and NYC a low one. You are aware that both cities switched from leaded to unleaded gas at about the same time, are you not?
BTW, have you figured out how that Aprilaire humidifier works? I know any of the 4 of us could install a simple humidifier and get it working. Maybe that's why you're so pissed off and get into so many nasty arguments? You're just mad as hell because you can't install or get working a humidifier from the #1 manufacturer. And you're too arrogant and hot headed to let anyone help you.