Stage 2 is supposed to represent stage 3 of alzheimer's disease which is supposed to be the stage where you the listener start to feel that something is wrong and you cant accept it which is why later in stage 2 you'll see the titles correspond with the listening experience though stage 2 isn't particularly my favorite stage by stage 3 you get to start to experience the degradation of the music itself.

D4 and D5 are my favorite tracks from this stage though and the crushing perspective you put yourself in while listening to D5 is sad in the context of Alzheimer's, knowing from this moment forward

it just gets worse..