How Not to Be Stupid

the apparent safety that redundancy provides can lead people to make sloppy decisions. They may assume—incorrectly—that even if something goes wrong, there’s a fail-safe in place. Redundancy, in other words, can’t be a substitute for good design.

Essentially stupid people are dangerous and damaging because reasonable people find it difficult to imagine and understand unreasonable behaviour.

Why do smart people act stupidly? What skills and dispositions are they missing that can explain these mistakes? And how can we cultivate those qualities