I sat at my computer desk, checking Google's information about predictive dreams, and found that the so-called predictive dreams are scientifically called the sense of déjà vu or the hippocampus effect.The reason I checked this information is because I have had a strange feeling since I was a child. After every deep sleep, if I have any dreams and this dream is extremely in line with reality, it may happen on a certain day in the future. Of course, there is no way to determine this time, it may take several days or years.