Lorelai: Listen, a "D" is one grade. It's not the end of the world. You'll catch up, you'll do better. You are of hardy, stubborn stock. If there's one thing I gave you, it's stubbornness.
Rory: I'm not stubborn.
Lorelai: Yes, you are.
Rory: No, I'm not.
Lorelai: Fine. You're not.
Rory: Thank you.
Lorelai: You're welcome.