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.

While Senator Rockefeller attacks the electronic cigarette companies for targeting kids with flavored products that he claims is going to addict and harm them, he is hiding from the public the truth:

The Rest of the Story

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