Hello, I’m Zhan Qingyun.

The Case of the Speluncean Explorers is a short book I sincerely recommend to anyone interested in law.

Listeners are presumably interested in jurisprudence. A Chinese translation exists, though the English original often expresses key terms more clearly.

After briefly describing its fictional facts, the book presents opinions by several judges. Together, their arguments capture major modern approaches to interpreting law. It is intellectually demanding, engaging, and great fun.

Let us introduce it briefly.

Five people exploring a cave are trapped when a landslide blocks the entrance, apparently creating a state of nature.

Unlike sailors isolated on a vast sea in Dudley, their families report them missing and rescue efforts begin immediately.

Lon Fuller adds complexity: ten rescuers die in a second landslide, making the cost of rescue explicit.

On the twentieth day, radio contact establishes certainty. At least ten more days are needed to open the cave.

Dudley contained uncertainty because rescue might have arrived immediately. Here, another ten days is certain.

The explorers explain that their food is gone.

Medical experts say survival without food for ten more days is impossible. Necessity is genuine.

They ask whether four could survive by killing and eating the fifth. The experts say yes—another certainty, as if Dudley had known that killing Richard Parker guaranteed survival.

The five agree to use chance to select a victim. The person who first proposed the method later withdraws, but the others continue and include him despite his objection.

They use dice rather than drawing lots. The original proposer loses.

The other four kill him, consume his body, and survive until rescue.

As in Dudley, Fuller stipulates that a jury finds all these facts and the necessity proven. Five appellate judges must decide the case.

The thought experiment contrasts schools of legal interpretation that still exist. Judges’ styles differ, and their view of law changes outcomes.

That is why lawyers research each court and judge before litigation.

In a state-of-nature problem, the central stylistic difference concerns law’s relationship to morality.

A later expanded edition adds more judges and complexity. We discuss the original five, each representing a distinct approach.