We all lie to ourselves to be happy. It's not until a film like Memento comes along, or that you personally have to deal with someone close who suffers a form of this subject to hand, that you get jolted to remember just how your memory is such a prized and treasured thing - and crucially that it's one of your key safety devices. Christopher and Jonathan Nolan crafted one of the best films of 2000 based on those facets of the human condition. Their protagonist is Leonard Shelby, played with stupendous believability by Guy Pearce, who is suffering from a memory amnesia caused by a trauma ...