Inheritance in itself conflicts with encapsulation. First because it gives access to protected members of the super class. So it breaks encapsulation to the let

Inheritance in itself conflicts with encapsulation. First because it gives access to protected members of the super class. So it breaks encapsulation to the letter. Secondly because it hurts code locality so much. To such an extend it is difficult for the average programmer to determine what is going on by simple looking at the program. We have a recrutement test on this. Although candidates usually have a good intuition at what the test program does, it is amusing how easy it is to make them doubt by asking simple questions. Dynamic dispatch principle in itself is well understood but it opens so many questions about member access, non virtual methods access, overloaded method access to which people usually have no firm answer.