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I must admit I have tolerance for that bullshit. The cigs don't contain any of the dangerous chemical in a cigarette - you don't need a study to prove they are safe, you just need a decent understanding of chemistry.

But a million anti-smoking advocates don't give a shit.

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The set of chemicals in cigarettes that are dangerous is a subset of all chemicals known to be dangerous. One can conclude something quite important from that fact without any understanding of anything other than basic reasoning skills.

If nicotine isn't harmful in itself, why does chewing tobacco cause cancers of the mouth?

Because there are more than 70 carcinogenic compounds in tobacco.

Are nicotine skin patches causing an epidemic of skin cancer where they are placed?

Not all side effects are caused by the active ingredient.

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