premise: Nordstrom ran ads in the newspaper for help with pest control during the 1980s . 
hypothesis: In the mid-1990s , Nordstrom ran newspaper ads promising , for certain products , that if the size or color of an item the customer wished to purchase was not in stock at the store , Nordstrom would locate the desired item and mail it to the customer at no additional cost'both the item and its delivery were free .