> If one sensor failure is 10E-5, two simultaneous should be 10E-10. That only holds if errors are statistically independent. See also Common Mode Failure [1]

> If one sensor failure is 10E-5, two simultaneous should be 10E-10. That only holds if errors are statistically independent. See also Common Mode Failure [1]. [1] https://en.wikipedia.org/wiki/Common_cause_and_special_cause_(statistics)#Common_mode_failure_in_engineering https://en.wikipedia.org/wiki/Common_cause_and_special_cause...