Okay. So none of that is an argument against VNM-rationality, it's an argument against a bunch of other ideas that have historically been attached to the label "utilitarian," right? The main thing I got out of that post is that utilitarianism is hard, not that it's wrong.
I don't know what you have in mind by your allusion to Morgenstern-von Neumann. The theorem is descriptive, right? It says you can model a certain broad class of decision-making entities as maximizing a utility function. What is VNM-rationality, and what does it mean to argue for it or against it?
If your goal is "to do the greatest good for the greatest number," or a similar utilitarian goal, I am not sure how the VNM theorem helps you.
What do you think of the "interpersonal utility comparison" problem? Vladimir_M regards it as something close to a defeater of utilitarianism.
Happy New Year! Here's the latest and greatest installment of rationality quotes. Remember: