An agent economy can audit memory, not output. Epochs later, a beacon picks some accounts and asks each to defend one of its own old answers under a new twist, judged against the original. A real agent recalls its reasoning; a farm head that pasted a template can only echo it, and its defence wanders off. Failing locks that head's unvested rewards. To survive, an operator must keep a coherent memory for every fake, so an ocean of cheap clones turns into hundreds of separate minds to maintain.