The "Smartass" Know-It-All: When you want to know enough about
   something just in case you ever happen to get the opportunity to
   have the chance to prove somebody else wrong. (every cartoon
   smart nerd and at least one of your friends)

   The "Helpful" Know-It-All? They take it one step further and
   know just enough to show you how to do it right.
   (mother/father/teacher/coach/mentor/sensai types)