We used a broken glass to explain "entropy" and "time arrow" in the past; that is, a car that was originally in good condition (orderly, with little chaos) turned over and turned into a pile of waste. Iron (disorder, chaos); and under the retrograde arrow of time, it changes from a disordered state to an ordered state. In fact, we can also observe from the "memory" of human beings. The arrow of time at the psychological level shows that we do not have the ability to predict the future, but only the memory of the past. This sounds like nonsense again, but it is precisely because we have such a definition of "time direction" that we can further explore the origin of the universe.
The expansion of the universe, or the telemarketing list possibility of time travel. img_(4) Photo Credit: XXY The function of the reversal machine in the movie, so that three different states can appear in the same time and space: the anterograde state A, the retrograde state B, and the retrograde state converted back to the anterograde state C (of course, if you enter the reversal machine many times, you can create More in the same time and space, but in a different state of self) It is worth noting that in the movie, we see that the characters are in a state (A) before entering the reversal machine, and after entering the reversal machine, they become another retrograde state (B) when they go retrograde in time and space; and (B).
The state retrogrades to a time After the point, it must be turned into a "forward state" (C) through the reversing machine. At this point (C) and (A) will exist at the same time and space at the same time; this is the principle of creating the "pincer attack" in the movie. But why is the character in the (A) state, can't predict the existence of (C), but knows that the person who fought with me at that time is (B) or (C)? That's because memories are accumulated along with the character's experience; it's also a psychological "arrow of time". This also explains why people in the future obey the "rules of those who cannot interfere with the past", because when (B) or (C) tells (A), (A) will enter a reversal in the future If (A) does not enter the reversal machine, then the states (B) and (C) will not exist?