Verification independence means the person, test, or review path that checks a system should not be controlled by the same system that created it. In security and software assurance, this separation reduces circular validation: the output, the tests, and the explanation should not all come from one source that can make the work look correct without proving it is correct.
This matters because attackers and risky automation both exploit trust gaps. A malicious change may pass if the generator also supplies the test that “proves” it works, or if an AI agent writes code and then justifies its own design choices. Strong defenses keep generation and verification separate, use independent review, require evidence from primary sources, and apply human sign-off. The goal is not distrust for its own sake, but an audit trail that can stand on its own.