100% agree. Duplication is far cheaper than the wrong abstraction. Student: I notice that you duplicated code here rather than creating an abstraction for both

100% agree. Duplication is far cheaper than the wrong abstraction. Student: I notice that you duplicated code here rather than creating an abstraction for both. Master: That is correct. Student: But what if you need to change the code in the future? Master: Then I will change it in the future. At that point the student became enlightened.