Mary: I've lost two small hairbrushes, Claire. They're a pair.
Claire: Have you looked carefully everywhere?
Mary: Yes. They're nowhere here.
Claire: Have you looked upstairs?
Mary: Yes. I've looked everywhere upstairs and downstairs. They aren't anywhere.
Claire: Hh! Are they square, Mary?
Mary: Yes. They're square hairbrushes. Have you seen them anywhere?
Claire: Well, you're wearing one of them in your hair!
Mary: Oh! Then where's the other one?
Claire: It's over there under the chair.