> When the only certainty is killing people, I'd question whether the incalculably remote possibility of "unforeseeable advantages" undoing that killing counts for anything at all.
I'm somewhat inclined to agree with you but I don't think misrepresenting the arguments made by proponents is the same thing as rebutting them, like you did in this second comment.
> The last thing advocates of euthanasia and DNR for the heavily-suffering should want to see is their ethical arguments muddied by cryogenics salespeople hanging round hospitals persuading people that they'd be better off dying shortly after diagnosis...
Uh, that's great and everything but it's not even remotely relevant to the point of whether QALYs are a more appropriate measure than raw years of life for measuring the effectiveness of cryogenics. Sorry if that sounded a little caustic, but I find enormously tiresome the cynical tactic of appealing to "that argument is dangerous, what if someone down the road abuses it?" when one is unwilling or unable to address a point. Particularly because you could come up with some scenario in which pretty much every assertion could be used for ill.