Dr. Linkletter: So then we're able to take the ends of the strings and connect them to a ten-dimensional membrane. Yes, Sheldon.
Sheldon: Dr. Sturgis taught us that if you leave the strings open, it allows far more possibilities.
Dr. Linkletter: We don't believe you need open strings anymore. That's an older model of thinking. Now... Yes, Sheldon.
Sheldon: Just because something is older doesn't mean that it's not still good. Original Star Trek is older than Next Generation, but if you think that Mr. Data is better than Mr. Spock, you don't know what you're talking about.
Dr. Linkletter: I don't know what you're talking about.

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: Hello. Am I correct that the bus to Dallas has a stop in Rusk?
Stan: Yup.
Sheldon: I'd like to buy one ticket, please.
Stan: You need an adult to buy it.
Sheldon: Oh, I didn't know.
Stan: That's the rules.
Sheldon: I'm just trying to visit my friend in the hospital. Not the regular kind of hospital, a psychiatric hospital. He's actually a brilliant scientist in the field of theoretical physics. Dr. John Sturgis, you may have heard of him. Anyway, he's a great guy. We're almost the same height... And then he and my meemaw became a romantic item, not that there haven't been bumps in the road. I actually helped them by writing up a relationship agreement. I love drawing up contracts. But I don't love drawing. Interesting. Anyway, he doesn't drive. Maybe one day he'll take a bus and you'll get to meet him. Anyway... Even though I'm clearly her favorite grandchild, she swatted my bottom. It didn't hurt that much physically, but emotionally, it stung like the dickens.
Stan: Here you go. One ticket to Dallas with a stop in Rusk.
Sheldon: But that's against the rules.
Stan: I'm an adult, I bought it.
Sheldon: Ooh, a loophole. Thank you. I'd tell you all about the etymology of the word "loophole," but I have a bus to catch.

Clara: Anyone sitting here?
Sheldon: No.
Clara: Aren't you a little young to be traveling alone?
Sheldon: Yes, but I'm quite a capable traveler. I've memorized the entire bus schedule for the state of Texas. Ask me anything.
Clara: No, thanks.
Sheldon: Okay, but if at any point you'd like to know what time the bus from Waco arrives in Houston, ask away. 4:15, except on Fridays when they make a local stop in Huntsville.
Clara: No wonder this seat was empty.

Sheldon: And then they grounded me. Can you believe it?
Clara: Yes.
Sheldon: But I didn't do anything wrong.
Clara: You did everything wrong. You were nothing but rude and ungrateful.
Sheldon: You really think so?
Clara: The only selfish person in that story is you.
Sheldon: There's a Star Trek episode called "The Devil in the Dark" where the miners thought the Horta was the monster, but actually the miners were the monsters because they were killing its eggs. Are you saying it's like that?
Clara: Sure.

Sheldon: I can't find an umbrella.
Mary: What do you need an umbrella for? It's gonna be hot and sunny.
Sheldon: I think you've answered your own question.

Dale: George, I figure we kind of got off on the wrong foot the other day.
George: Don't worry about it.
Dale: Well, I do worry about it. I-I'd like to take you out for a beer, if that would be okay.
Sheldon: It appears Meemaw told him about you, too.

Dr. John Sturgis: Here we go.
Adult Sheldon: For many kids, Christmas morning was the most exciting day of the year. That's only because most kids don't know the joy of getting their college midterms back. It also didn't hurt that Dr. Sturgis looked like an elf.
Dr. John Sturgis: Nice work, Sheldon. Now, you'll notice that your grades are lower than expected. That's because Sheldon did so well, he broke the curve, turning your A's and B's into B's and C's.
Sheldon: They don't seem happy about it. Maybe you can give them candy.

Dr. John Sturgis: So if Einstein's analysis of time is correct, the future's already happened, but we'll discuss that in more detail next week.
Sheldon: Or perhaps we already have.
Dr. John Sturgis: Exactly. [laughs]
Meemaw: Good one.

Mary: I've got something here for both of you. It's from Billy.
Sheldon: I hope it's not another invitation.
Mary: It's probably a thank you note.
Sheldon: So now I have to write a you're welcome note? You people are killing me.

Sheldon: The television station's in Houston. Drive me there. I'm sure they have a copy of it.
George: [chuckles] I'm not driving to Houston.
Sheldon: Well, then, I should warn you, I am very unhappy.
George: Okay.
Sheldon: In fact, I am peeved.
George: Okay.
Sheldon: I would slam this door right now, but it would startle me, so just imagine I did.
George: Okay.

Sheldon: Why would you bring that pecking poop machine into our home?
Missy: To save her life.
Sheldon: What about my life?
Missy: She's not trying to kill you.
Sheldon: Oh, yeah? Then why was there hate in her eyes?
Missy: That's how everybody looks at you.

Mary: Shelly, I got you something.
Sheldon: The Professor Proton Science Kit! Wait a minute. Last time you gave me a present for no reason, I had to get a booster shot.
Mary: Nothing like that. I was just thinking, it might be a fun thing for you to share with Paige.
Sheldon: Sharing. Sometimes I feel like you don't know me.
Mary: Paige is having a rough time at home right now, and I think she could really use a friend.
Sheldon: A crocodile could really use a meal, but that doesn't mean I should leap into his mouth.
Adult Sheldon: This was the woman who cut the crusts off my sandwiches. She had me.
Sheldon: Into the mouth I go.

Paige: Why are you taking a backpack to the mall?
Sheldon: This is my mall safety kit. Earplugs to drown out crowd noise, Wet-Naps to wipe down escalator handrails, a compass, a map of the mall, and a whistle, in case I get lost or approached by a woman holding a perfume bottle.
Missy: You want to stuff him in there, right?
Paige: No. [nods]

Sheldon: I didn't see any bow ties, just a shirt with a bad word on it. What did you put in your pocket?
Paige: Nothing.
Sheldon: Are you guys stealing? Because if you are, I am prepared to literally blow the whistle on you.