John: Hey, I've got a question. Do you have any of my books?
Mike: No, why?
John: Someone borrowed Harry Potter from me last month and I completely forgot who it was :(
Mike: Dude, I read Harry Potter in the fourth grade.
John: Yeah, me too but that's not the point. So you don't have it?
Mike: Nope. 
John: OK, nevermind, I've just asked Ben, he's the one I gave it to.
Mike and John read Harry Potter books as kids. Mike does not have any of John's books. John has lent his Harry Potter book to Ben.