Friends recommended this movie to me. Smart friends. Memento is a classic who-done-it murder mystery (...) We are deliberately fed conflicting misinformation at the end of the film (or should I say the beginning?). It is as if the director (...) structured the plot-line in reverse chronological order, with the hope that his audience would be sufficiently confused that they would either assume there had been logical explanations for everything or, better yet, they would had invent their own explanations. My friends have come up with differing explanations (...), however these explanations are not necessarily grounded in the "facts" presented in the film. (...)The real kicker is that many people are watching the movie over and over, hoping to figure it out. Dustin Hoffman's character in Rain Man will sooner figure out "Who's on first." And that's because Memento, like Abbott and Costello's famous routine, is not a riddle - it merely thinks that it is.