There must be a case when a person obeying the Peter Principle was occupying a key position where they were able to evade any attempt to monitor what they were doing. A key position, by its very nature, allows wide autonomy. “There are not enough quality inspectors in the universe to ensure good quality work if the person supposed to be producing the good quality work does not want to, or does not know how to”.
Flight software would provide a spectacular example.
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