I like that one. The narrator in doubt... Wow. It means the narrator would question everything the characters say, and as a result the reader will doubt the characters. Now that is something. It would definitely make for a good story.

Completion is the norm, but must it be so? I have seen movies in which the end did not tie all the loose ends but left me speculating on what happened after the movie ended. Would it be bad to have a book like that?
I would like to think that no story truly cones to an end except with death. And they lived happily ever after does not cut it for me. No one lives happily ever after.