Often the content of the rule is indeed of minor importance, provided the same rule is universally enforced. To revert to a former example: it does not matter whether we all drive on the left- or on the right-hand side of the road so long as we all do the same. The important thing is that the rule enables us to predict other people’s behavior correctly, and this requires that it should apply to all cases—even if in a particular instance we feel it to be unjust.
