Strip away the robes and the Latin and a courtroom is a factory with one product: findings of fact. Did the signature exist? Was the driver drunk? Who fired first? Everything the law can do — free a person, take their property, their liberty, their life — depends on getting a factual question right. That is why the oldest ritual in the room is a promise about truth: the truth, the whole truth, and nothing but the truth. Perjury is not rudeness to the court. It is sand in the machine that decides people's lives.
When the machine ingests falsehood, the output has a name: wrongful conviction. Since 1989, DNA evidence has exonerated hundreds of people in the United States who served years — some decades, some on death row — for crimes they did not commit, convicted on mistaken identifications, false confessions, and forensic testimony that was simply untrue. Each exoneration is two errors corrected at once: an innocent person imprisoned, and a guilty one never pursued. False facts do not just fail the accused. They fail the victim too.
The system's saving grace is that it was built by people who assumed error. Adversarial argument, cross-examination, rules of evidence, appeal — each is a device for stress-testing claims, on the theory that truth is most likely to survive a process designed to attack it from both sides. The machinery is imperfect and often slow, but its premise is the point: the law does not ask whether a fact is convenient, popular, or comfortable. It asks whether it is so.
A society that stops caring whether verdicts track truth still has trials, judges, and prisons. It just no longer has justice — because justice is not the punishment. It is the accuracy.