Highly recommend this movie for people who appreciate good acting and don't expect their movies tied into a neat, little bundle at the end. It had the best acting across the board of any movie I've seen lately; but Meryl Streep and Philip Seymour Hoffman we brilliant. We had just seen Meryl Streep in "Mama Mia" two days earlier, and I had to keep reminding myself that this was the same woman. When you walk out of the theater, you'll appreciate how it got its title and you'll feel a little "doubt".