I had never seen Donnie Darko, and I just did. I think I have never been so confused after watching a film.
I looked up on the Internet for explanations about the movie, and I found out that in the Director's Cut everything is much clearer and self-contained in the movie, specially due to the showing of some pages of the book Sparrow wrote.
So how is it expected that the public could develop by themselves all that super complex theory about Living Receivers, Artifacts and Tangent Universes? I feel that it's not right that the original movie didn't have these crucial elements in it.
Is it possible to arrive to what appears to be the canonical explanation for the whole plot, without watching the Director's Cut? Does the original film actually make sense by itself?