In all forms of utility theory that I know of, utility is only defined up to arbitrary offset and positive scaling. In that setting, there is no such thing as negative, positive or zero utility (although there are negative, positive, and zero differences of utility). In what setting is there any question of whether negative utility can exist?
In all forms of utility theory that I know of, utility is only defined up to arbitrary offset and positive scaling. In that setting, there is no such thing as negative, positive or zero utility (although there are negative, positive, and zero differences of utility). In what setting is there any question of whether negative utility can exist?