written by Christopher Nolan, from the short story by Jonathan Nolan
Leonard Shelby: Memory's unreliable. No no no, really. Memory's not perfect; it's not even that good. Ask the police. Eyewitness testimony is unreliable. Cops don't catch a killer by sitting around remembering stuff. They collect facts, they make notes, and they draw conclusions. Facts, not memories. That's how you investigate. I know. It's what I used to do. Look, memory can change the shape of a room; it can change the color of a car. And memories can be distorted. They're just an interpretation, they're not a record, and they're irrelevant if you have the facts.
Kudos and much thanks go to Stephen for this monologue, it is very much appreciated.