"The lack of verification in no way diminishes the appeal that urban legends have for us," writes Jan Harold Brunvand in "The Vanishing Hitchhiker: American Urban Legends and Their Meanings" (W.W. Norton & Company, 1981). "We enjoy them merely as stories, and tend to at least half-believe them as possibly accurate reports."
A renowned folklorist, Brunvand is considered the pre-eminent scholar on urban legends and "The Vanishing Hitchhiker," named for a classic legend, the subject's seminal work. The definition of an urban legend, he writes, is "a strong basic story-appeal, a foundation in actual belief, and a meaningful message or 'moral.'"