Who said "Homer, you're not stupid, you're just not thinking."?

This quote is attributed to Lisa Simpson.

Homer, you're not stupid, you're just not thinking. - Lisa Simpson

"Homer, you're not stupid, you're just not thinking."

Lisa Simpson Humor

"I'm not a bad girl, I'm just drawn that way."

"The only way to win is to not play."

"Understanding is the first step toward love."

"If something is hard to do, then it's not worth doing."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."