Conversation between the Reverend Geraldine Granger (Dawn French) with Alice Tinker (Emma Chambers) in The Vicar of Dibley (in my opinion, this ranks right up there with Abbott and Costello's routine, "Who's on first?"):
Alice: You know that stuff they're selling now at the local shop? Geraldine: Which stuff? Alice: I Can't Believe It's Not Butter. Geraldine: Oh yes Alice: Well, I can't believe it's not butter. Geraldine: Yeah, well I believe that is the idea, yeah. Alice: Then yesterday, I went to Crookenden and I bought this other stuff, like a sort of home-brand, you know? Geraldine: Yes. . . . Alice: And you know, I can't believe it's not I Can't Believe It's Not Butter Geraldine: Mmm. I'm losing you now. Alice: Well, you know I Can't Believe It's Not Butter? Geraldine: Yeah, you think it is butter. Alice: No, no, I mean you know the stuff that I can't believe is not butter is called I Can't Believe It's Not Butter. Geraldine: Probably, yeah, yeah. Alice: Well I can't believe the stuff that is not I Can't Believe It's Not Butter is not I Can't Believe It's Not Butter and I can't believe that both I Can't Believe It's Not Butter and the stuff that I can't believe is not I Can't Believe It's Not Butter are both, in fact, not butter. And I believe they both might be butter, in a cunning disguise. And in fact there's a lot more butter around than we all thought there was. Geraldine: (long pause) Yeah. . . . You see, I don't know what you're talking about!