Big Bang Theory Quote
Penny: Oh, come on, a smart guy like you; it'll be a challenge. You could make it like an experiment.
Sheldon: Interesting. I suppose if someone could teach sign language to Koko the gorilla... I could teach you some rudimentary physics.
Penny: Great! A little insulting, but great. I'll be Koko.
Sheldon: Not likely. Koko learned to understand over two thousand words, not one of which had anything to do with shoes.
Quote from S03E10 - The Gorilla Experiment