Taken from Lost, season 5, episode 4, when Jack confronts Carole about wanting back her grandson and she has no clue what he's talking about.
Jack: I understand that you feel the need to do this, but I need you to know, that everything that Kate and I have done, it was for Aaron.
Carole: ...who's ... aaron?
Girl: Oh Ha ha! No way bra they're so cluless.