well the grey parasite is ever present even with the actual greys in retreat, it takes a long time to go away naturally..as you can see by the cycles of the mayan calendar. The nobody has expressed that our grey matter should not be greyed at all. He believes that no other animal or mammal at least has offcolor "grey matter" and that it should always look a healthy pink. When diseases like mad cow disease get introduced then you see the cow's brain go from pink to grey in that area and they show signs of the classic ms type symptoms etc..