I just want to say that those who don't understand hope they can ponder. In-depth spoilers below.
This movie is actually about the robot mother who wants to cultivate a new generation of human beings after the extinction of human beings. This generation of human beings will be more noble and perfect than the previous generation (higher IQ, more overall view, more selfless...) The heroine is one of the tests. AI teaches the heroine to train her various abilities (such as the question about who the five people will save) and do the assessment. Those who pass all the tests will become the next generation of human beings and cultivate the next generation of human beings. Those who do not qualify will be killed or abandoned. The first test was abandoned because it didn't pass (the old woman who was doing things) and was adopted by a surviving couple. The second generation was burned directly because the test was only 70 points. Only the eldest daughter completed the test and entered the final test, which is selflessness. AI first let the robot hurt the old woman, and then the old woman found AI's home by virtue of her childhood memory (maybe just subconscious). Later, the heroine was taken away (showing selfishness). Although the heroine went with her, she kept thinking about her brother and came back to find her. At this time, she really passed all the tests. The task is handed over to the heroine. From the beginning to the end, AI has been acting in order to test the selflessness of the heroine, and even when it first killed the mouse, it was to make her daughter suspicious. In the end, the daughter also understood the intention of AI, which is the meaning of the last picture.
The film explores many philosophical issues, such as the private and the big picture.
If you don't understand, go to Zhihu and Baidu. After you truly understand the whole movie, you will feel that you are so stupid that you are being played by the director all the time!
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