Defining them as "intentional bugs" doesn't seem particularly accurate or useful. Some of them may class as "design" rather than "coding" bugs but they still a

Defining them as "intentional bugs" doesn't seem particularly accurate or useful. Some of them may class as "design" rather than "coding" bugs but they still aren't usually what the programmer intended, and I would say that the majority of production defects that I see in our systems these days would fall into this category.