Fahrenheit is known as The Indigo Prophecy in some regions because that's the name of the prophecy surrounding the Autistic girl Lucas Kane rescues from destruction at the orphanage where she lives. As a result of this prophecy, the girl is known as the Indigo Child, and I reckon that's where Jenny McCarthy got her whacked out ideas about 'Indigo Children'. I know all this because I played Fahrenheit to death, and because I truly am Autistic, unlike Evan McCarthy, who has Landau-Kleffner Syndrome, not Autism.