Testimony: Live Logic

Three to six people give testimony, one statement at a time. Each of them is either always truthful or always lying — never a bit of both. Your job is to press the button the instant their statements can no longer all be true together. Not when you suspect someone. Not when you have worked out who is lying. The moment the story stops holding. WHAT MAKES IT DIFFERENT This is not a puzzle you solve at your own pace. Statements arrive on a clock, and the contradiction can appear on the third line or the ninth. You are reading and reasoning at the same time, and that is the whole game. Two things make it stranger than it sounds. A speaker can take back what they said. The moment they do, their earlier statement stops counting — so a contradiction can open and then close again. Press after it closed and you were right about the wrong instant. And about one round in four never contradicts at…