Fundamental goals are neither rational nor irrational. A rational thinker with no non-rational goals would have no reason to ever do anything--including think at all.
Two perfectly rational agents with the same fundamental goals would, of course, inevitably select the same sub-goals and actions to reach those goals.
But at some point if you keep asking a rational agent "but why do you want to do that?" the only answer will be "because it is my nature."
Two perfectly rational agents with the same fundamental goals would, of course, inevitably select the same sub-goals and actions to reach those goals.
But at some point if you keep asking a rational agent "but why do you want to do that?" the only answer will be "because it is my nature."