A class from a nearby university was visiting a major drug manufacturer. The tour guide led the students to a glass-enclosed room. They could see several people in white lab coats. With her back to the glass, the guide announced: "In this room researchers are actively searching for a cure for cancer."
She stopped short as the group broke out laughing. Puzzled, the guide turned to look.
Through the glass she saw three scientists in animated debate, flipping through the Yellow Pages.