Luke: "You know, I think tht R2 unit we bought might have been stolen."
Uncle Owen: "What makes you think that?"
Luke: "Well, I stumbled across a rocording while I was cleaning him. He says he belongs to someone called Obi-Wan Kenobi. I thought he might have meant old Ben. Do you know what he's talking about?"
Uncle Owen: "Mm-mm."
Luke: "I wonder if he's related to Ben."
Uncle Owen: "That wizard's just a crazy old man. Now, tomorrow, I want you to take that R2 unit to Anchorhead and have it's memory erased. That'll be the end of it. It belongs to us now."