Passionately Curious 2- what is, and isn't stupidty.

...I feel a great need to subtitle this post as "mama always used to say 'stupid is as stupid does...'" (and no, Einstein didn't say that one. That was Forrest. Forrest Gump.)

What is NOT stupidity...

 source 1, source 2.

 What IS...

(come on, don't even tell me that the above quote isn't incredibly witty!)

source

 "The difference between stupidity 
and genius is that genius has its limits."

source