Anybody with sufficient understanding of the situation should be able to deduce the outcome, because it is dependably going to be whatever the rational answer is! Decision Theory allows us to identify the best course for a certain set of values and goals, and the rational answer will be the same for everyone.

Nitpick: It doesn't matter how much or how little understanding; as long as you specify the knowledge available just as you specify the vallues/goals, then everybody still gets the same rational answer. An answer that they'll be happier with if they start with better understanding, but a rational answer all the same.