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No more often than the names of the sub-functions themselves becoming inaccurate ime.

At some point the system does depend on its authors doing the right thing.

The right thing, I can define with code and check for correctness with tests. I guess I mean that if it can be expressed clearly in code, it should.

But I don't completely disagree that they can have their place. They just get used as crutches for unreadable code a lot of time, that's all.