When Arby and 343i Guilty Spark try to warn Tartarus the Prophets have deceived him about the Halo rings and The Great Journey, Tartarus replies with [i]what you say is heresy![/i] OK, he views Arby as a heretic for allying with the humans and dismissing the Prophets teachings [b]but[/b] what else would Tartarus expect Arby to be after the prophets secretly plotted with the Brutes an Elite genocide?