Sheldon: Yeah, I have to say, it is nice to share this experience with someone who's on the same journey. Although right now ours is testing off the charts while yours is floating around in its own waste.
Bernadette: Are you actually comparing my human baby to your brain in a bowl?
Sheldon: Well, I didn't make you waddle up four flights of stairs for the heck of it.
Bernadette: You do realize my baby has functioning organs and can recognize voices.
Sheldon: Yeah, but ours can recognize a specific data stream among background noise.
Bernadette: Mine has a fully developed immune system.
Sheldon: Ours doesn't need an immune system because it lives in a state-of-the-art German incubator.

Amy: Sheldon, that's enough.
Sheldon: Oh, yeah, no, fine. Let's just agree that both creations are special in their own way and it is foolish to try and compare them. Although, we didn't need to have sex with Howard for ours, so we win.

Sheldon: Look, look here I am standing next to the incubator. Uh, here is a microscopic view of the cells.
Bernadette: Look at that. Put them in a tiny Flash T-shirt and it's you.

Amy: Sheldon, this is a rudimentary collection of neurons. I mean, it's remarkable, but it's still limited in what it can do.
Sheldon: I understand. (Talking to the petri dish of brain cells) She's the mean one, I'm the fun one.

Howard: Huh, they screwed up and gave us steamed broccoli.
Raj: Oh, no, that's mine.
Leonard: Really? The last green thing I saw you eat was a Skittle.

Howard: No, she's right. As long as I've known you, you've always been self-conscious about your cleavage.
Raj: It's because you keep trying to stick pencils in it.

Raj: It's a gravitational wobble. It could be a sign of an extrasolar planet that may contain life and someday be named after me.
Issabella: Oh well, if it has life, maybe it already has a name, huh?
Raj: Yeah, but it's probably difficult to pronounce.
Issabella: What is your name?
Raj: Rajesh Ramayan Koothrappali.
Issabella: You think it would be more difficult than that?
Raj: Good point.

Issabella: You know, I have to say, based on the candy wrappers and the bags of junk food I see in this trash, I thought the person working here was ten years old.
Raj: Oh, please, show me a ten-year-old who knows to dip Tootsie Rolls in Nutella.

Sheldon: Oh, my goodness! I see quivering black lines. Those must be neurons. Oh, they're so thick and beautiful.
Amy: Those are your eyelashes. Move!

Amy: Well, Sheldon I see astrocytes. Our combined skin cells are now a primitive neural network.
Sheldon: I have such a profound sense of creation. I jus- It's like when I hatched Sea-Monkeys, except that this is from my DNA, so this is like Me-Monkeys.
Amy: These cells come from both of us.
Sheldon: Yeah, but Us-Monkeys doesn't pop. Oh, oh, oh, oh, wait! We-Monkeys. There you go.

Sheldon: Hey, when can we start running tests on it?
Amy: No reason we can't start right now.
Sheldon: What stimulus should we introduce it to first? Light, sound, temperature? Ooh! Ooh! Let's expose it to images of me and you and see who it likes better.

Amy: What are you doing?
Sheldon: I'm just contemplating Buridan's donkey.
Amy: I understand. I'll leave you be.
Sheldon: What, you're familiar with the reference?
Amy: Of course. Jean Buridan proposed a philosophical thesis stating that a hungry donkey placed between two equidistant bales of hay would be paralyzed by indecision and would starve to death.
Sheldon: Exactly.
Amy: Well, I wouldn't want you to starve to death, so here's an eggplant.
Sheldon: Thank you.
Amy: You know, some people believe that Buridan was plagiarizing Aristotle.
Sheldon: Really?
Amy: Although, in Aristotle's example, he proposed an equally hungry and thirsty man caught between food and drink.
Sheldon: Huh. Yeah, I wonder if that's related to the 12th century Persian philosopher, Al-Ghazali and his story of a man caught between two dates.
Amy: Are you suggesting Al-Ghazali was Aristotelian? 'Cause if anything, he was anti-Aristotelian.
Sheldon: Al-Ghazali was anti-Aristotelian? Boy, you think you know a guy.

Leonard: Just hiding some stuff in your closet, don't tell Penny.

Leonard: I'm kidding, I want you to feel at home here. Decorate it any way that makes you happy.
Penny: Do you really mean that?
Leonard: I really do.
Penny: Great, and just so you know, I'm not getting rid of all your stuff.
Leonard: Yeah? What are you keeping?
Penny: That candle and ... you.
Leonard: What about my robot poster?
Penny: Buh, buh, buh, buh, buh- I can make do with just the candle.

Amy: What's going on?
Sheldon: I'm struggling with the thought of leaving my old bedroom.
Amy: Can it be more of an internal struggle?
Sheldon: I have to see it. While I'm gone, don't breathe on my pillow.
Amy: How about if I just don't breathe at all?
Sheldon: That's my girl.