# G36 -- A score is not a closeness until its diff is read

A permuter, waypoint or similarity score is a number about a masked comparison; the diff behind it is read before it is
believed, in both directions — a rejected waypoint may carry one unsound hunk and two sound levers.
provenance: BFM R63; a masked "1" that had replaced an add with a store
### E.4 — The campaign