A partly underlying issue here is that it’s not clear that the consequentialist/non-consequentialist division is actually all that deep or meaningful if you really think about it. The facts about “utility” in a consequentialist theory, are plausibly ultimately just a kind of short-hand for facts about preferability between outcomes that could be stated without any mention of numbers/utility/maximizing (at least if we allow infinitely long statements). But for non-consequentialist theories, you can also derive a preferability relation on outcomes (where what you do is part of the outcome, not just the results of your action), based on what the theory says you should do in a forced choice. For at least some such theories that look “deontic”, in the sense of having rights that you shouldn’t violate, even if it leads to higher net well-being, the resulting preferability ranking might happen to obey the 4 axioms and be VNM-rational. For such a deontic theory you could then express the theory as maximizing a relevant notion of utility if you really wanted to (at least if you can cardinalize the resulting ordering of actions by prefertability, via looking at preferences between chance-y prospects I don’t know enough to know if meeting the axioms guarantees you can do this.) So any consequentialist theory is sort of really a number/utility-free theory about preferability in disguise, and at least some very deontic feeling theories are in some sense equivalent to consequentialist theories phrased in terms of utility.
Or so it seems to me anyway, I’m certainly not a real expert on this stuff.
Great point, David! I strongly upvoted it. There are lots of possible utility functions, so I think VNM-rationality imposes very few constraints.
Thanks.
A partly underlying issue here is that it’s not clear that the consequentialist/non-consequentialist division is actually all that deep or meaningful if you really think about it. The facts about “utility” in a consequentialist theory, are plausibly ultimately just a kind of short-hand for facts about preferability between outcomes that could be stated without any mention of numbers/utility/maximizing (at least if we allow infinitely long statements). But for non-consequentialist theories, you can also derive a preferability relation on outcomes (where what you do is part of the outcome, not just the results of your action), based on what the theory says you should do in a forced choice. For at least some such theories that look “deontic”, in the sense of having rights that you shouldn’t violate, even if it leads to higher net well-being, the resulting preferability ranking might happen to obey the 4 axioms and be VNM-rational. For such a deontic theory you could then express the theory as maximizing a relevant notion of utility if you really wanted to (at least if you can cardinalize the resulting ordering of actions by prefertability, via looking at preferences between chance-y prospects I don’t know enough to know if meeting the axioms guarantees you can do this.) So any consequentialist theory is sort of really a number/utility-free theory about preferability in disguise, and at least some very deontic feeling theories are in some sense equivalent to consequentialist theories phrased in terms of utility.
Or so it seems to me anyway, I’m certainly not a real expert on this stuff.
Thanks, David! That makes sense to me.