Q: When is an opera not an opera?
A: When it's a Broadway show.
Q: Then when is a Broadway show not a Broadway show?
A: When it's an opera.
Q: So how do you tell the difference?
A: That's a tough question.
These days, a very tough question. For too long "opera" has been narrowly + defined as what goes on at the Metropolitan Opera House; a rigid distinction between art and entertainment, fervently defended by a musical flat-earth society, has denied audiences the riches that lie beyond the narrow shoals of the classical repertoire. Today, though, singers and conductors...