scientific exchange from the movie "Awakenings"

Dr. Sayer (Robin Williams): "Earthworms!"

Dr. #1: "I'm sorry?"

Dr. Sayer: "It was an immense project. I was to extract 1 decigram of myelin from 4 tons of earthworms."

Dr. #1: "Really?"

Dr. Sayer: "Yes! I was on that project for 5 years. I was the only one who believed in it. Everyone else said it couldn't be done."

Dr. #2: "It can't."

Dr. Sayer: "I know that now.  I *proved* it."