How The Butterfly Effect Violates Its Own Time Travel Rules
2004 sci-fi/horror movie The Butterfly Effect has its lead character repeatedly travel through time, but at one point breaks its own rules. Time travel stories are inherently difficult to keep straight, if only because time travel isn’t a thing we can actually do, at least that anyone knows of. Thus, writers are forced to rely either on existing scientific theories, or make up their own rules for time travel out of whole cloth, sometimes combining both methods....