Fable
Two courts of judges, one seeking consensus, one seeking contention
In the government office there were two judging panels, both handling complex commercial cases. The first was the consensus panel—five judges discussed and had to produce a unanimous verdict; if someone insisted on objecting, they continued discussing until persuaded or until the minority submitted to the majority. The second was the debate panel—five judges were paired off to refute each other until one side's arguments could not stand, and the last remaining person gave the final opinion.
The consensus group was efficient on ordinary cases. Three judges first unified their opinions, the other two were persuaded, and the whole process ended in half a day. Once the judgment was issued, the parties knew it was a joint decision of five people, and on appeal they questioned the judgment of the whole group, not any one individual.
But the consensus group once hit a deadlock. In a dispute involving the interests of three firms, five judges discussed for three days, split into three factions, and no one could convince anyone else. In the end it was decided by drawing lots—a fallback mechanism in the consensus group's rules, but everyone knew that a judgment drawn by lot was no different from flipping a coin.
The debate group had an advantage on complex cases. The process of paired rebuttal exposed everyone's holes: an argument one judge insisted on could not stand after three rounds of rebuttal and had to be revised; an argument another judge was initially not optimistic about ended up winning because no one could break it logically. After three days of debate, the person with the most solid remaining argument had his judgment tested by everyone's attacks.
But the debate group had its own problems. One judge was especially strong at debate and could make an obviously biased argument sound plausible, winning over opponents through verbal skill rather than facts. His final opinion was not questioned; instead, it passed because of the momentum he had built up during the debate. This situation would not arise in the consensus group, because no one could be persuaded—the quality of the argument itself determined whether it could stand.
The prefect later conducted a comparative analysis. The consensus group's judgments had a higher affirmance rate on appeal, showing that results reached by consensus are more stable; the debate group's judgments had a higher correction rate on complex cases, showing that debate can expose flaws that consensus cannot find. The two groups were each suited to completely different types of cases.
Finally the prefect set a rule: simple cases go through consensus, producing a consistent conclusion quickly; complex cases go through debate, using adversarial confrontation to expose hidden problems. How quickly a case needs to be closed and how much omission it can tolerate determine which approach to use.