“Let’s define dumb as being different from stupid.  Dumb means you don’t know what you’re supposed to know.  Stupid means you know it but make bad choices. […]  Dumb used to be a by-product of lack of access, bad teachers, or poor parenting.  Today, dumb is a choice, one that’s made by individuals who choose not to learn.  If you don’t know what you need to know, that’s fixable.  But first you have to want to fix it.”

Seth Godin, Whatcha Gonna Do With That Duck?