Big Bang Theory Quote
Penny: (Sheldon holds up a flash card) Helium.
Sheldon: Yes.
(Penny holds up a picture flash card)
Sheldon: Taylor Swift.
Penny: Yes.
(Sheldon holds up another card)
Penny: Pi.
Sheldon: Yes.
(Penny holds up another picture)
Sheldon: Kardashian.
Penny: More specific.
Sheldon: (after a pause) Khlo??
Penny: Yes!
Sheldon: Ah! See, I remember because if it looks like Kim, it's Kim; if it looks kinda like Kim, it's Kourtney; if it looks nothing like Kim, it's Khlo?.
Penny: (Sheldon holds up another card) Oh, that's a venn diagram. And I remember because I thought to myself: 'Venn is he going to stop talking about this diagram?'
(Leonard enters)
Leonard: What are you guys doing?
Sheldon: Oh, well, we decided to use our breakfast time to expand our respective knowledge bases.
Leonard: Hnh. Let me try.
(Sheldon and Penny each hold up a card)
Leonard: Atom of hydrogen; Adam of Maroon 5; mike drop.
Sheldon: I'm sorry, who is Mike Drop?
Quote from S09E23 - The Line Substitution Solution