Absolute irrationality
Considering the effects of relativistic irrationality one wonders if there is a universally applicable utility function that can not be rationally objected to. Consider axiom 1.2.3.2 that I base my concept of morality on:
1.2.3.2 To exist is preferable over not to exist
Objecting to this statement would consequently be equivalent to self annihilation. Reformulating axiom 1.2.3.2 into a utility function one could formulate an unobjectionable utility function as following:
Ensure continued co-existence
Not only can an individual not rationally object to that but no one in a group can rationally object to an individual having said goal. The individual can not because it would imply the desire for self annihilation and the others can not because it would imply the desire for being annihilated. Any objection to the above utility function can thus be considered irrational.