[noirbot]

There was a comment I saw the other day along the lines of "Science will tell you what the numbers are, but doesn't make a judgement of how big that number should be."

You can get a pretty good estimate of how many lives would be saved if we smoked less, or drank less, or did any number of other things, but ultimately that's an input into a public policy decision making system that doesn't have a provably right answer unless everyone involved agrees on what the desired outcome is.