The question: Does smoking a single cigarette measurably harm your body?
The single answer references a study which confirms that a single cigarette will raise the level of carcinogens present in the smoker's body within 15 to 30 minutes. The (unstated) implication is that, therefore, a single cigarette does, in fact, measurably harm one's body.
Is this up to Skeptics standards for answers? As far as I can tell, this posts strongly implies a "yes" without actually citing relevant evidence (but appearing to do so for someone who doesn't look carefully enough).