Law & Justice

Legal reasoning is secretly mathematical. The law's 'but-for' test — would the harm have happened anyway? — is exactly the statistician's trick of imagining a parallel world where you changed one thing, so tort law reasons about alternate universes. And the rule of law demands the rules apply the same no matter who invokes them, which is the legal cousin of proving a program behaves identically on every possible input.

When people tried to make AI decisions 'fair,' like a score predicting who might reoffend, they hit a wall that's actually a proven mathematical fact: you can't satisfy every reasonable meaning of 'fair' at the same time. Pick one kind of fairness and you're forced to break another. So building fair AI isn't about finding the perfect answer; it's about choosing which unfairness you're willing to live with.

Courts and journalism are two machines built to find the truth. The reporter's two-source rule, the burden of proof, and protecting your sources all mirror the rules of courtroom evidence — a working system for knowing what's true, running without a judge. And the right to control your own image slams into free speech: representation is exactly where dignity and expression fight, from defamation to deepfakes.

Law is just very high-stakes reading. Judges fight the same battle as book critics — is a text's meaning fixed by its exact words, its author's intent, or its reader? — except a constitution's reading commands armies. And all of contract law is a bet that words reliably hook onto the real world; lawsuits break out at the exact spots where that hook slips.

Justice assumes one responsible person inside each skull — and psychology keeps testing that assumption. Split-brain patients can have two centers of will in one head, quietly threatening the law's idea of a single blameable agent. And whether a killer goes to prison or a hospital can hinge on a diagnosis with fuzzy edges, so the insanity defense forces the law to lean on psychiatric categories that psychiatrists themselves keep redrawing.

Courts are forced to answer philosophy's hardest questions with real consequences. Whether a river or an AI counts as a 'person' isn't armchair debate — courts have granted rivers legal personhood, so metaphysics decides who's allowed to sue. And US judges must legally rule which methods count as 'science' before a jury may hear them, making a philosopher's test of what's real science into actual courtroom law.