Answer: The narrative of a protagonist trapped in a time loop, where escape is possible only after accumulating knowledge through multiple passes, is a popular trope in fictional works. Rubin noted that with his script, he "stumbled upon a story with all the makings of a classic, so simple and true that it could be retold many different ways by many different storytellers." The concept of a time loop in fiction did not originate with Groundhog Day; one earlier identified example is the 1973 short story "12:01 PM
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