Justice is defined in terms of ideals, which change little, but whose interpretation evolves. Citizens may not grasp the ideals, but would know their neighbours' interpretation of these ideals. Trial by jury accommodates geographic and temporal interpretations, while the common ideals enable jurisdictions to learn from each other.
Rationalism is suitable for all ages. Empiricism requires engagement, leading to responsibilities and risks. One can learn to deny inferences, but not facts. In order to learn to withstand facts, one ought to be exposed to empiricism from an early age, notwithstanding the risks.