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Op 18 mrt. 2012 om 15:15 heeft Thomas Beale <thomas.beale at oceaninformatics.com> het volgende geschreven: > I still think Quantities should be computable as such - if we don't know how > many mcg of substance 3 puffs is, we can't compute with it. Although i tend to agree with you, this won't work because then you assume that we're talking about the absolute truth. The absolute truth only exist when you're talking, for instance, about astronomics. In medicine you can't say 25 ml of alcohol is lethal. You can only say something like: 25 ml of alcohol is lethal in an adult man of 80 kg. And only when he doesn't drink more than 15 unit alcohol ? week. When he drinks more then The lethal dose is higher. For ? roman of the same weight who drinks < 15 units ? week, the lethal dose is lower. My point is that an absolute quantity alone doesn't meander much. At The other hand, we know empirically that if someone has smoked 15 pack years he's at serious risk. Then about puffs. I' m almost sure that you can translate ? puff info a volume. If i remember it correctly 40 drops is 1 ml. So the same should go for puffs. Cheers, Stef
