Dr. John Sturgis: Is it possible that we're too old to learn new things?
Dr. Linkletter: Nonsense. This would have been over my head even as a young man.
Dr. John Sturgis: Maybe we just need someone to explain it to us.
Dr. Linkletter: Are you talking about Sheldon?
Dr. John Sturgis: I'm sure he'd be happy to help.
Dr. Linkletter: Oh, that's what I'm afraid of. I don't want to give him the satisfaction of thinking he's smarter than us.
Dr. John Sturgis: But he is smarter than us.
Dr. Linkletter: I know that and you know that, but he can never know that.

Jim: Here we are. Grab a shovel and dig in. There you go.
Dr. Linkletter: I spent the summer in Italy once.
Georgie: Bringing back memories?
Dr. Linkletter: No.

Sheldon: Dr. Linkletter, I need to talk to you.
Dr. Linkletter: Are we in my office?
Sheldon: No.
Dr. Linkletter: Then these are not my office hours.
Sheldon: Are you using my love of schedules against me?
Dr. Linkletter: [chuckles] Oh, yes.
Sheldon: Well done.

Sheldon: Dr. Linkletter, I need to talk to you.
Dr. Linkletter: Great.
Sheldon: Do you think you could get me access to the telescope room? I want to search for exoplanets that could support life.
Dr. Linkletter: Are you feeling homesick?
Sheldon: Are you implying that I'm from another planet?
Dr. Linkletter: Yes.
Sheldon: Compliment accepted.

Adult Sheldon: I always believed my extraordinary life would be chronicled in numerous biographies. I even used to make up my own titles. My favorites were: "From Texas to Success: the Sheldon Cooper Journey", and "Cooper for Kids", a pre-school introduction to quantum gravity in superstrings. The point is, I knew my formative years would be well-documented, which meant I needed to polish up some of my early academic credentials, especially East Texas Tech.

Sheldon: If W is the Kähler metric on the algebraic variety X, and the canonical bundle KX is trivial, then X is what?
Dr. John Sturgis: A Zariski space.
Sheldon: Wrong. [slaps Dr. Sturgis's hand with his pencil]
Dr. John Sturgis: Hey!
Dr. Linkletter: Obviously, it's an elliptic curve.
Sheldon: Wrong. [slaps Dr. Linkletter's hand with the pencil]
Dr. Linkletter: Hey!

Dr. John Sturgis: Why are you hitting us?
[flashback:]
Mei-Tung: Wrong.
Sheldon: Ow! Why'd you hit me?
Mei-Tung: Pain is the best teacher.
[present:]
Sheldon: I'm teaching you.
Dr. Linkletter: Well, it feels like you're hitting us.
Sheldon: Like you, I struggled with these concepts, but eventually, I mastered them, through hard work, resilience and a healthy dose of knuckle whacking.