[Lumpold]

Remind them that Nicotine has been shown to stop alzhiemer's, and to come back in 3 decades when they're going down the pan and you aren't.

Also, point out the for general Scientific purposes, a 92.5% accuracy is required for something to be true, apart from smoking, where 'peer pressure' has reduced this to 82%.

Or, in line with some others here, and as I pretty much did (see my Oliva V Lancero review), point out their hypocrisy and tell them to F*ck off!