[AdamJacobMuller]

Right. A system can function at (effectively) 100% correctness being composed of individuals who are not 100% perfect (because nobody is).

If 1 person is 99.99% correct, how correct are 3 people when consensus is required to make a decision? 5? Its just math.

[eutectic]

You can only 'do the math' if you assume uncorrelated errors and no unanticipated or emergent failure modes.