What urban legend, involving a member of the Beatles, is a hobby of Gerben Moerman?
Gerben Moerman: Gerben Albert ("Gerben") Moerman (Schipluiden, 1976) is a Dutch sociologist who teaches at the University of Amsterdam (UvA). Gerben Moerman:  He is considered something of an expert on breaching, and has drawn attention for a hobby of his--the Paul is dead conspiracy theory. Paul is dead: "Paul is dead" is an urban legend and conspiracy theory alleging that Paul McCartney of the English rock band the Beatles died in 1966 and was secretly replaced by a look-alike.
Paul is dead