How many other classic films completely reshot nearly everything with a different lead actor and lived to tell the tale? After 1985, Back to the Future became the ultimate shorthand for all discussions about time travel, paradoxes, and alternate timelines. The rules of Back to the Future follow their own set of timey wimey logic, even if that logic only exists to serve the narrative. Back to the Future wants the audience to like it. It wants to be a crowdpleaser, and it wants this status more than it wants to make sense.