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army1987 comments on The Mere Cable Channel Addition Paradox - Less Wrong Discussion
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Nice dialogue!
I think that the term "barely worth living" is a terrible source of equivocation that underlies a lot of the apparent paradoxicalness. "Barely worth living" can mean that, if you're already alive and don't want to die, your life is almost but not quite horrible enough that you would rather commit suicide than endure. But if you're told that somebody like this exists, it is sad news that you want to hear as little as possible. You may not want to kill them, but you also wouldn't have that child if you were told that was what your child's life would be like. What Parfit postulates should be called, to avoid equivocation, "A life barely worth celebrating" - it's good news and you say "Yay!" but very softly. I'd even argue that this should be a universal standard for all discussions of the Repugnant Conclusion.
Yes, I had thought about setting the zero of the function to be summed across individuals to a higher level than “just barely good enough for them not to want to die”. The problem with that is that then there would be people who don't want to die but still have a negative utility, and even a total utilitarian would conclude they had better die (at least in “dry water” models when you neglect the grief of their friends and family, and the cessation of the externalities of their life).
Edit: It looks like “dry water” has acquired a meaning totally unrelated to the one I had in mind. (It was the derogatory term John von Neumann used to refer to models of fluids without viscosity, whose proprieties are very different from those of real fluids.)