We want the law to be fair and objective. We also want laws that work in the real world, protecting and reassuring us, and maintaining our social and cultural values. The moral dilemma is that we can’t have both. This may be because humans are hopelessly irrational and need a rational legal system to keep them in check. But it may also be that rationality has limits, and that trying to sit in judgement over everything is as cruel and farcical as gathering cats in a sack.