That reminds me of this story about removing empty boxes from a production line.
https://userweb.cs.txstate.edu/~br02/cs1428/ShortStoryForEng...
https://userweb.cs.txstate.edu/~br02/cs1428/ShortStoryForEng...
I don't believe this story
2.Put fan there to blow empty boxes: now defects == 0
I don't see the problem.