LYNNWOOD -- The unassuming instructor with the soft voice holds a phone to each ear, juggling cell and land lines. The desktop in his office pings with endless incoming e-mails. One may laud him as intellectual dissident, another rip him as religious heretic. He apologizes for the interruptions. "The phone hasn't stopped ringing," says Thomas Murphy, the cultural anthropologist whose challenge of Mormon doctrine has landed him in hot water with his church and thrown his name into headlines across the country.Not that it has cramped his style. "I think it's fair to conclude that the Book of Mormon is...