In which Claire illustrates the difficulty presented by having an extremely literal and logical child: 
Claire:  "Stop being an idiot, Margot!"
Lindsay:  "Claire, I don't want to hear you talking to Margot like that.  You're not allowed to use that word."
Claire:  "Lindsay -
 she is being a complete fool. That's what idiot means.  
She is putting her pencil in her ear and then rubbing it on me! That is idiotic, 
and if I used any other word, it wouldn't make sense."
