In short: 
I. Unconscious incompetence	-    I don't know why I cannot done that
II. Conscious incompetence	-    I know why I cannot done that
III. Conscious competence    -    I know why I can done that
IV. Unconscious competence	-    I don't know why I can done that

http://www.trainer.org.uk/members/theory/process/stages_of_learning.htm
http://www.trainer.org.uk/resources.htm

What you know may not be what you do - http://www.markhneedham.com/blog/2011/01/13/chris-argyris-espoused-theory-vs-theory-in-action

隨筆：科研新手的煩惱 - https://lunjian.wordpress.com/2016/04/16/%E9%9A%A8%E7%AD%86%EF%BC%9A%E7%A7%91%E7%A0%94%E6%96%B0%E6%89%8B%E7%9A%84%E7%85%A9%E6%83%B1/

This approach—which focused on fluency instead of simple understanding—put me at the top of the class. - http://nautil.us/issue/40/learning/how-i-rewired-my-brain-to-become-fluent-in-math-rp