"IMO, he needed to first learn how to listen and receive feedback before he could move on to the next step. Unfortunately, some people are just too stubborn and

"IMO, he needed to first learn how to listen and receive feedback before he could move on to the next step. Unfortunately, some people are just too stubborn and will not change." That comment is largely true regardless of what the subject is, not just for programming. Inability to admit error is a huge hurdle for learning in general, because it prevents you from learning from your mistakes and may also prevent you from challenging yourself.