“The computer may be incompetent in itself--that is, unable to do the work for which it was designed. This kind of incompetence can never be eliminated, because the Peter Principle applies in the plants where computers are designed and manufactured.”
Fritz needs Fred and Fred needs Fritz. Fritz feed Fred and Fred feeds Fritz.
Fred feeds Fritz with ritzy Fred food. Fritz feeds Fred with ritzy Fritz food.
And Fritz, when fed, has often said, “I’m a Fred-fed Fritz. Fred’s a Fritz-fed Fred”