Review: The Armstrong Lie

If documentary film was once considered the presentation of truth, the best examples of its contemporary boom seem now more concerned with examining the nature of truth itself. As if the genre had begun to no longer trust its own motives, we now see deliberate use of unreliable narrators, and are invited to consider the anatomy of a lie. Lance Armstrong is as unreliable a subject as you're likely to find, and by the end of Alex Gibney's latest film, you're still not sure whether he's telling the whole truth.