Why is Mitchell confused when Nerus changes his voice to that of a human (as opposed to the deep evil multi-voice that the Goauld usually speak in)? It has been established that they don't have to talk like that since the first episode of the series. When Kowalski was host to the symbiote in "Children of the Gods" there were times when it was obvious that Kowalski was not in control but it was his voice talking. The same is true when Carter was host to Jolinar and when Imhotep took K'tano as his host in "The Warrior". If Mitchell has read every SG-1 report as he claims then he should know that the Goauld don't have to talk like that.