Principlev1
When designing critical systems, ensure backup paths do not
When designing critical systems, ensure backup paths do not share failure modes with primary paths by using independent implementations, physical separation, or diverse technologies.
Why This Is a Principle
Derives from Every detection system faces a fundamental tradeoff between (tradeoff in detection systems) and Complex systems that work evolved from simple systems that (complex systems evolved from simple systems). The principle prescribes independence in redundancy design to avoid common-cause failures. It's actionable (use independent implementations) and general (applies across engineering, cognitive systems, and organizational design).