"It borders on bizarre that critics like [West Virginia Senator Jay] Rockefeller continue to question the existence of those former smokers, even while arguing that e-cigarettes should be restricted or banned based on the that vaping will lead to smoking among teenagers who otherwise never would have tried tobacco."

Anecdotes are in fact data. Of course, what you do with that data and how you interpret it is affected by the nature of how the data were obtained. But anecdotes are data. Remember, the connection between smoking and lung cancer itself was first uncovered by a case series. Physicians started to note multiple cases of lung cancer - which was very rare at the time - all occurring in smokers. While these patients could be called "anecdotes," they were also people who provided very real and important data that led to the discovery that smoking causes lung cancer. That connection would not have been found had these "anecdotes" been dismissed.

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