Catastrophes used to be regarded as Acts of God, but nowadays tend to be blamed as Acts of Man. Although human error is a cause in the majority of accidents, it is seldomly the sole cause. Major accidents are usually the result of several errors made at different moments by different people that coincide in an extraordinary way.

Errors are common and inevitable. Humans make them regularly. But, when made in interaction with devices that can "crash, sink, burn, or explode," errors can have cat...