I'm completely baffled by your reply. I have no idea what the "technical sense" of the term "utility function" is, but I thought I was using it the normal, LW way: to refer to an agent's terminal values.

Your usage was fine. Some people will try to go all 'deep' on you and challenge even the use of the term "terminal values" because "humans aren't that simple etc". But that is their baggage not yours and can be safely ignored.