I have just replayed F1 with Fallout Fixt mod. In FotA building there is a ghoul that gives the "find the spy" quest that was broken in vanilla game. This ghoul also mentions that he had been sent by the overseer to find the waterchip. This had apparently happened long before the game protagonist embarked on his mission, because the ghoul claims that he had been given a shotgun by the overseer, but it was lost "over the course of years" or something like that. This has always bothered me - if other(s) were sent on a "fool's errand" to find the waterchip years ago, how long has the vault survived without water? Is the ghoul's story even considered canon? It is unfortunate the overseer cannot be confronted about that.