Ahh.... I don't quite get it. So I assume it means Hachikuji (or any other ghosts for that matter) aren't able to learn or pick up new information then?
But she clearly remembers Araragi and Senjougahara so that doesn't quite make sense either...
Zetsubou Shitta! All this confusion has left me in despair! (屮ﾟДﾟ)屮
Halps Plz!
lol =P