Quote from Rose in Little Sister
Rose: Wow, two Dreyfusses. Sophia: No, one Dreyfuss. That's the point. I want to return the second, but I don't know how to tell which is which. That's where you come in. What do I do? Rose: Well, there's only one thing I can think of. We used to do it back on the farm, and I may be a little rusty, but it's worth a shot. Sophia: Whatever it is, do it. I'm desperate. Rose: OK. Here goes. Dreyfuss, come here, boy! This one's Dreyfuss.