Samantha
Samantha asked Allison Burnett:

This question contains spoilers… (view spoiler)

Allison Burnett Maybe this will help: The world that we shift to at the end of the movie is merely the realistic version of the world that we have just left, the world as presented by Katie, who has embellished and concealed and distorted things a bit to protect her identity and perhaps to inflate her sense of importance. Now we see who the people really were before Katie distorted them in her blog. But in the difference lies the difficulty in her mother (or us) ever discovering what happened to her. She has been lost in the miasma of social media.
In a way, the not knowing what happened to Katie/Amy is really the point of the movie.
What matters is not so much whether someone hurt Katie, it is that anyone might have, as her beauty, sexuality, youth, and recklessness inspired such intense anger and desire from men.....
I know it's difficult for many viewers, especially when so much art these days tells you everything, but you have to see if you can embrace the ambiguity. If you can, it becomes a much bigger and better movie. At least I think so.

I guess what I am saying is that the not knowing is truly the point, and it always was, from the moment I began writing the novel.

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