Re: whose CEV?

I'm certain this was explained in an OB post (or in the CEV page) at some point, but the notion is that people whose visions of the future are currently incompatible don't necessarily have incompatible CEVs. The whole point of CEV is to consider what we would want to want, if we were better-informed, familiarized with all the arguments on the relevant issues, freed of akrasia and every bad quality we don't want to have, etc.; it seems likely that most of the difference between people's visions of the future stems from differing cultural/memetic backgrounds, character flaws, lack of information and time, etc., and so maybe the space of all our CEVs is actually quite small in configuration-space. Then if the AI steered towards this CEV-region in configuration space, it would likely conform to many people's altruism, and hence be beneficial to humankind as a whole.