David Frederick Wingfield Verner, better known by his stage names Dai Vernon or The Professor, was a Canadian magician.

Magic, which encompasses the subgenres of illusion, stage magic, and close-up magic, among others, is a performing art in which audiences are entertained by tricks, effects, or illusions of seemingly impossible feats, using natural means. It is to be distinguished from paranormal magic which are effects claimed to be created through supernatural means. It is one of the oldest performing arts in the world.