Big Bang Theory Quote
(Opening lines)
Sheldon: I invented a new science joke. Would you like to hear it?
Amy: Of course
Sheldon: How many Edisons does it take to screw in a lightbulb?
Amy: How many?
Sheldon: None, because he stole the idea for the lightbulb and doesn't deserve his own joke.
Amy: Is that true?
Sheldon: Of course. That's how you know it's a good joke. It entertains and educates.
Quote from S08E15 - The Comic Book Store Regeneration