This argument is fallacious, I believe, because there are many things that changed from one cohort to the next. The introduction of cigarette filters is only one such change. To assume that any observed changes in cancer risk from one cohort to the next must be attributable to one particular change - the filter - is not appropriate, in my view.

Clive goes on to cite two specific examples of conclusions that Glantz disseminated to the public which were not supported by his own research.

5. The majority of dual users (e-cigarettes and cigarettes) are using e-cigarettes every day, and half are using at least two cartridges/disposables per day.

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