Columbia Journalism Review used to have full-page advertisements from Xerox that read, "You can't Xerox a Xerox on a Xerox. But you can make a copy on a Xerox-

Columbia Journalism Review used to have full-page advertisements from Xerox that read, "You can't Xerox a Xerox on a Xerox. But you can make a copy on a Xerox-brand copier." It was effective, in that I remember the ad many years later. But it didn't do much to change the way people use language.