Adult Sheldon: Teachers have always been impressed by me. And my new college professor was no exception. You'd think it was my once-in-a-generation intellect. But it was more than that. There was my wicked sense of humor.
Dr. Linkletter: ...explained by maximizing entropy. Yes, Sheldon?
Sheldon: Entropy. It isn't what it used to be.
Adult Sheldon: Plus, when things got heavy, I was always ready with a fun fact to lighten the mood.
Sheldon: Fun fact: Did you know that the ancient incas stored bureaucratic records on knotted strings called "quipu"? Q-U-I-P-U. Quipu.
Adult Sheldon: Whatever the reason, I was clearly his favorite student.
Dr. Linkletter: Connie, what a treat it is to see you.
Adult Sheldon: Look at him smile. He couldn't get enough of me.

Adult Sheldon: I didn't realize until years later that my father was only asking questions about lightning and thunder to cheer me up. In fact, he would often pretend to be dumb just to make me feel better.

Adult Sheldon: My father didn't always get the credit he deserved. The advice he gave me actually worked out pretty well. Of course, I never told him.
George Sr.: Talked to Billy.
Missy: Why would you do that?
George Sr.: No, it was good.
Missy: Stay out of my life.
Adult Sheldon: He may not have been the world's greatest dad. But maybe we weren't the world's greatest kids.

Adult Sheldon: Visiting Tam's house for the first time was an emotional roller coaster.
For example, it's traditional in Vietnamese homes to have gruesome religious iconography near the entrance. I did not like that.
However, it's also customary to not wear shoes around the house for sanitary reasons. I did like that.
Interestingly, one of the main ingredients in Vietnamese cooking is an extremely pungent condiment known as fish sauce. I did not like that.
But before every meal, it's common for everyone to wash their hands and face. I did like that.
Forks are not customary in a Vietnamese household. I did not like that.
And instead of napkins, there was one towel for everyone to share at the table. Seriously, what are they thinking?

Sheldon: State troopers. I wonder what they want.
Adult Sheldon: It turns out they wanted me. Fun fact, this was one of seven times I was brought home by law enforcement once, on the back of a horse.

Sheldon: That robotics lecture's going to be eye-opening. Get ready to forget everything you know about robot communication.
Meemaw: Moon Pie, I don't know if we're gonna go to this thing.
Sheldon: Why not? We've established that you're free, and I'm a child, so my schedule's wide open.
Meemaw: It's complicated.
Sheldon: Well, we're just sitting here, and we have to talk about something.
Meemaw: Can you just let this one go?
Sheldon: I think we both know the answer to that question.

Sheldon: Tam, I need help navigating a social situation.
Tam: I'm eating lunch with you. You think I have the answer?
Sheldon: Dr. Linkletter invited me to a lecture on robotics, but my meemaw said he's only doing it to spend time with her.
Tam: Are you asking if men do sketchy things to get dates?
Sheldon: Yes.
Tam: Well, then, I can help you. Absolutely. Last week, I told Jessica Geiger I was an extra in Karate Kid Part II.
Sheldon: Did it work?
Tam: Again, I'm having lunch with you.