I think the real thing people are disagreeing about here is whether you're still a smoker when you're deliberately going 6 months without smoking. Is 'smoker'

I think the real thing people are disagreeing about here is whether you're still a smoker when you're deliberately going 6 months without smoking. Is 'smoker' a permanent status, like some people consider themselves alcoholics even when they haven't drunk alcohol in a decade? If so, you could have a submarine full of smokers very easily! But if you're only a smoker if you've had at least 1 cigarette in the past week, your submarine would have no smokers after seven days at sea.