I remember reading about how the TSA was very unsuccessful in catching errors, because they faced a large number of true negatives day in and day out. The alarms barely ever went off, and when they did, it was usually a false positive. The natural human tendency in that situation is to optimize / reduce energy expenditure by letting your guard down and paying less attention.

In security, "covert tests" that replicate rare events (like attempting to sneak a gun through a checkpoint) more frequently, seem to increase the chances of success in detecting real threats [0]. If only we could do the same for our legal system.

[0]: https://www.cmu.edu/news/stories/archives/2013/november/nov4...