one of my favorite examples of fruitful redundancy is Cliff Stoll noticing a 75 cent discrepancy between two different accounting logs that let to the discovery

one of my favorite examples of fruitful redundancy is Cliff Stoll noticing a 75 cent discrepancy between two different accounting logs that let to the discovery of an intruder in the Lawrence Berkeley Lab network. https://www.amazon.com/Cuckoos-Egg-Tracking-Computer-Espionage/dp/1416507787 https://www.amazon.com/Cuckoos-Egg-Tracking-Computer-Espiona...