“Learning involves doing what you do not know how to do, which is not the same as pretending you know what you are doing. Pretending you know what you doing is often detrimental to learning. It keeps you from asking questions or getting help because you are trying not to be found out. Doing what you don’t know how to do, on the other hand, is about taking risks and doing new things, not just sticking with what you already know.

If you only do what you know how to do you can better at what you already know, but it is not possible to do something qualitatively different.”