[T]his is why I consider Memento one of the most important movies ever made. He can’t form any new memories, so every new day is a complete blank to him. Every day he has to rediscover his purpose, and recommit himself to his white hot burning hatred for someone he doesn’t even know, and can’t possibly remember twenty minutes from now. He has no idea what he’s tried before, or how it worked out, and he’s physically incapable of learning it. But none of that stops him from literally committing murder, because “justice” or something.
It’s like being inside a liberal’s head for two hours.