The biggest problem with Stan's approach is that when you examine e-cigarette users who are not using the product to quit, you are introducing a huge sampling bias. For example, why might someone use e-cigarettes, but not to quit? Most likely, the majority of vapers who are using e-cigarettes for a purpose other than cessation are using e-cigarettes to cut down on the amount they smoke. They are likely to derive benefits from smoking reduction. However, they are almost assuredly not going to quit smoking because they are not trying to quit, nor do they have such a desire.

Futhermore, one of the problems noted in the deeming regulations is the fact that: "The vast majority of the respondents who were aware of these products indicated that they believed e-cigarettes were less harmful than traditional cigarettes...".

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