For two reasons.

Clearly, the actual scientific evidence doesn't matter to an agency that is being guided purely by ideology and which has come to a pre-determined conclusion that e-cigarettes are evil. Today's story demonstrates how a strong pre-existing schema, propped up by ideology, leads to such preposterous scientific statements such as arguing that although many ex-smokers have used e-cigarettes successfully as a cessation aid, there is no evidence that any ex-smokers have used e-cigarettes successfully as a cessation aid.

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