and I'm reminded by the movie WarGames when the nuke officers (not sure the actual designation) are replaced by relays... I'm just glad the officer-just-doing-his-job expects systems to fail & trust hsi own judgment, instead of our current ever-increasing trust in machines
In Wargames they detected a massive preemptive attack. One of the things that tipped off the officer in this case was that it was such a small scale attack, which doesn't make sense because it leaves the enemy willing and able to respond.
Taught that in case of a real attack the US would have gone on an all-out offensive, Petrov told his bosses the alarm must have been caused by a system malfunction.