[title: Debate Club:]
Sheldon: Proposition: the newest member of the Debate Club should be Sheldon Cooper. You're the affirmative. Go.
Ashley: Who's Sheldon Cooper?
Sheldon: Me. And I believe I should not join the debate team because there are far more valuable uses of my time.
Ashley: Do you want to join or not?
Sheldon: That's the debate, isn't it?
Ashley: I don't know what's happening.
Sheldon: If you're thrown for a loop, wait until you hear my rebuttal. Sheldon Cooper should not join the debate team because your leadership is clearly questionable.
Ashley: Okay, you're not in the club.
Sheldon: Ha! I win. Wait.

Mary: Let's say grace.
Sheldon: Hang on, safety first. [puts mittens on]
George Jr.: When are you gonna get over that?
Sheldon: I would think recent events would make you value protection.
Mary: Enough.

Ms. MacElroy: Now, can anyone tell me why Melville shifts the narrative voice from Ishmael to Ahab? [Ms. MacElroy waits for somebody else to raise their hand] Sheldon.
Sheldon: I have a tummyache. I'd like to see the nurse.
Derek: A "tummyache"?
Sheldon: Yes, Derek, I have a tummy and it aches. Ergo, tummyache.
Derek: Ergo?
Sheldon: It's Latin, Derek.
Ms. MacElroy: Go to the nurse.
Sheldon: And to answer your question, the shifting point of view grants the reader a broader perspective of events than typically allowed by first-person narration.
Ms. MacElroy: Where were we?
Sheldon: And "ergo" is Latin for "hence," Derek.

Missy: What's it like to not believe in God?
Sheldon: It's great. Big fan.
Missy: Are you ever afraid you're wrong?
Sheldon: About religion? Never. About other things? Also never.

Sheldon: I'm hurt Dr. Linkletter doesn't want me as a friend.
Mary: Understandable.
Sheldon: I'm also angry. I don't like having two feelings at once. It's annoying. Great, annoyed. That's three.

[title: Sci-Fi Club:]
Sheldon: So, what kind of activities does the Science Fiction Club engage in?
Greg: Well, this Friday we're having a screening of Star Wars on laser disc.
Sheldon: I thought this was the Science Fiction Club.
Greg: It is.
Sheldon: Star Wars is science fantasy. The Force is basically magic. At that point, you might as well be watching The Hobbit.
Greg: That's next week.
Sheldon: This is madness.

Dr. Willard: The Moho lies between the mantle and the crust, and...
Sheldon: Excuse me, I'm looking for Dr. Linkletter.
Dr. Willard: He's not here.
Sheldon: Sorry for wasting your time. Oh, this is geology. You're already wasting your time.