I then saw Albert by the school gate. He has returned
Albert: I want to visit Cheryl
Me: But you cannot just went back simply because you want to visit an extra copy of Cheryl besides the one we have. We need to minimise the amount of disruption to the timeline.
Albert: Well, I saw myself arriving a few moments ago, so...
Me: Then you assumed it is already a time loop
Me: Besides, going back to visit a past version of Cheryl means your own past self will not get to meet her after school, which means over time, you (present day) will felt a memory of sorrow due to your past self missing Cher…