[grzm]

> I appreciate the distinction that folks are making as far as what constitutes a carcinogen.

You do yourself a disservice by so stridently and repeatedly claiming "Nicotine is a carcinogen." There are plenty of compounds we're exposed to through tobacco use that are uncontroversially carcinogenic that you could point to instead (if you feel the need to name them explicitly), as well as a lot of other nastiness like formaldehyde as you point out above. Dwelling and defending this weaker position makes it easier for uncharitable readers to dismiss you.