Woah there. I think we might have a containment failure across an abstraction barrier.
Modelling moral propositions as facts that can be true or false is useful (same as with physical propositions). Then, within that model, utilitarianism is false.
"Utilitarianism is false because it is useful to believe it is false" is a confusion of levels, IMO.
Modelling moral propositions as facts that can be true or false is useful
Sure, sometimes it is, depending on your goals. For example, if you start a religion, modeling certain moral proposition as true is useful. If you run a country, proclaiming the patriotic duty as a moral truth is very useful.
In the sense that we might want to use it or not use it as the driving principle of a superpowerful genie or whatever.
I don't see how this answers my question. And certainly not the original question
...What experiences what you anticipate in a world where u
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.