In the rules for the European game, the last sentence under "Building a Train Station" states
A player is never required to build any Stations. For each Station a player has not used, four points are added to his score at the end of the game.
Does this mean that
- four points are added if he does not build a train station, or
- the points are added only if he builds the station but does not use it for one of his routes, i.e. he may put a station in but then not use a route which the station opens up?