dr. dessler, i agree with you in regard to smoking. would you agree that there was a time that the science was such that most scientists felt like that smoking was okay? >> i'm sorry, was there a time when they said smoking was okay? >> yes. when the medical authorities felt like smoking wasn't a big deal. >> yeah, early 20th century. >> so the point that i'm making is that the idea -- and i think you agree to it a few moments ago, in the sense that the idea when people question things, and all of a sudden their motives and their crazy questioning the scientific aspect of the day. because most of the time, whoever made it such, made the discovery, did the research and then started questioning, many times those people were held in poor state. so i don't think that's healthy. and i think you would agree with that. is that correct? >> yeah, i think that free inquiry -- >> so i think the question is, in the smoking example, you solve that problem by not smoking anymore. in this problem, we can't solve that problem by not having manmade co2