Garbage collection

Fred, looking pale and exhausted, arrives at Ben’s apartment, where he reveals that he has been recruited by MIT and a private contractor with Department of Energy clearance. They have confirmed his mathematical theories and built a time machine. Fred explains that the Universe operates as a reversible cellular automaton, meaning that when the time machine is activated, the Universe rewinds, erasing any memory of the event. This creates a loop where the day is relived without awareness of the rewind. Fred notes that while the loop is not closed, it is influenced by quantum uncertainties, making it unpredictable. The story highlights the complexities and limitations of time travel, emphasizing the philosophical implications of determinism and memory. QUESTION: How might the concept of a reversible Universe change our understanding of time and memory?