Sayid: Rousseau told us she saw black smoke the day her own child was taken 16 years ago. They took something from her and now she believes she has something that they want.
Charlie: She's making a trade?
Sayid: I believe she is, yes.
Charlie: That's insane. She's insane.
Sayid: Don't try to apply reason to her actions. She's a mother who lost her child, just like Claire.