If the time we are in is unfolded in a Turing machine, then Cris is the read-write head of the Turing machine. In the real world, in the only time and space we are in, this Turing machine is deterministic in terms of the history that has happened, and it is a probabilistic Turing machine in terms of the future. But the most powerful setting of this movie is that Cris is a non-deterministic Turing machine, that is, in a given period of time, ordinary people can only look for one possibility, but Cris can exhaust all possibilities , which is most vividly portrayed when searching for Liz in the ship.
The second setting is to limit the calculation space of Cris, but it is limited by the length of two minutes, so the distance that Cris can trace back cannot be too long, which makes it difficult to find the global optimum. A targeted set-up could lure Cris into a trap from which he couldn't escape for two minutes.
The third setting is about space. When we consider PSPACE-like computing problems, typical examples are QSAT and interactive games or game theory problems that can be especially described. This allows the plot to unfold in a game-like manner. The opponents are Casino security, FBI and terrorist gangs, and the computing space used is also increasing gradually, but since these three groups are ordinary people, the ending must be tricked. What is shown here is a huge difference in computing power between non-deterministic and deterministic Turing machines.
The fourth setting is the strategy adopted by Cris. So far, it is a simple brute force search + backtracking + pruning method. Of course, the brute force search here is embedded with human intelligence, so it is a greatly simplified and realistic possible path search.
The fifth setting is a troublesome thing, that is, Liz can expand Cris's ability to foresee, but there is no mention of the strength of the expansion. If it is 100 years, then there is no doubt that Cris can foresee his own death and his and Liz's death. The best life outcome (assuming that the life technology of immortality has not yet appeared in the world before death). There is no limit to this setting so far, so the scene after Cris wakes up in bed is just a search branch with limited depth, but every leaf of this branch seems to explode, and it is strange The only thing is that Cris did not expect this ending when he entered the ship, or the director showed us only a certain search path. Then Cris quickly backtracked to the root node of this branch. The root node was when Liz went out, and his father node was when he woke up in bed. Cris changed the branch path by calling the FBI.
The sixth setting is a hidden setting, that is, there is another big boss with the ability to predict. He has foreseen that there is a key character like Cris in the final ending, and he also knows that Cris has the ability to predict, and he has the ability to predict. Cris made some arrangements. So to a certain extent, the whole movie is just a calculation path for this BOSS, he must strengthen his participation in the sequel, and Cris must increase the search depth.
Last but not least, Cris's individual soldier forecasting ability is set to two minutes, but there are actually some bugs in this setting. For example, he can achieve longer-term forecasting and retrospective ability by writing a future record every two minutes or less. .
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