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This title is a good way of phrasing a piece of common sense people have been trying to get rid of.

Also similar: "Mechanism not policy"

> It is almost impossible to envision all of the different ways in which a system might be used by different types of users over the life of the product. This means that any hard-coded policies are likely to be inadequate or inappropriate for some (or perhaps even most) potential users.

https://en.wikipedia.org/wiki/Separation_of_mechanism_and_po...