Why does my sister keep asking my brother what happened back then?
According to the first part, the memory of passing through the past period will be left blank (past), and only the time point of passing through can be known (the future), that is to say, memory is continuous in this series, but time is not .
Another very important point is that the same point in time can only go back once, because it will lead to memory attribution problems. (Which future self should that blank memory belong to)
According to this line of thinking, my sister didn't know what happened at that time, which means memory loss, that is, at that time, the future self was in control of herself. She won't have this memory until she travels back to the past. So when did my sister travel back? In the end, when my brother was about to kill him, he went back to save his life. That is to say, the younger sister of the whole play did not obtain that memory.
As for why my brother can go back twice, it is actually a misunderstanding. First of all, according to the first part, the sequence of time-travels may not be in chronological order, that is, you can travel to 10 years ago, and then to 15 years ago, so that the second time-travel will affect the result of the first time-travel. So it’s easy to say it. The first time I just traveled to the time of the fire, but my brother didn’t know why the fire started (loss of memory, I can’t have this memory again until my future self travels back) The second time I traveled directly back to set the fire , kill his sister and complete all memories.
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