In the 1980s, a program called Graffiti started asking questions nobody had thought to ask, and one of them caught the attention of Paul Erdős. Almost forty years later, Randy Davila handed that same question to Theo-Conjecture, an automated discovery system supported by a large language model that proposes, tests and revises mathematical ideas in a loop. What came back was a proof of the answer Erdős and his collaborators had guessed at, an unexpected extra term nobody had predicted, and a glim...