Sally and Freda were friends. Sally once borrowed Freda's eraser since she left hers at home. They both had identical erasers. After Sally finished using the eraser, she returned it to Freda. Later, Freda asked Sally to return her eraser. Sally told Freda that she'd already returned it but Freda insisted that she hasn't. They broke into a disagreement. When Sally suggested they go and search their things. They found the erases in Freda's bag.
