I worked in a grocery store in the early 90's when the oat bran craze was kicking into high gear. Cheerios had placed a banner across the boxes stating that the cereal had oat bran. On older lady approached me in the cereal aisle.
Lady "Do you have any cheerios in the back without oat bran?"
Me "Cheerios are made out of oats, they have always had oat bran"
Lady with confused look on her face picks up a box of cheerios and continues on her way