"Apparently the Cerberus is named Fluffy," said Percy, grinding his teeth. "Because, you know, when it has teeth as big as Fang's head and fur that can deflect curses, that's the bloody obvious thing to name it." He blamed Hagrid. It had to have been Hagrid. No one else was that willfully oblivious to danger - except, apparently, the Headmaster. Who did not think Quirrell was going to try to steal the Stone but did think that Voldemort was going to try, which for some reason he seemed to think was less of a problem ...