the arm remaining from the terminator in the first part, and the chip;
and the research done by human scientists on this basis.
Human research has been destroyed as the bomb exploded. Later, the task of John and Sara changed to: destroy the chip and the wrecked arm; when these two things are destroyed, they can ensure that humans cannot develop self-controlling robots and Skynet, thus avoiding the world war on Judgment Day. .
When I saw the end, I had a question: when the chip and the robotic arm were thrown into the steelmaking furnace and destroyed at the end, why didn't the t-800 disappear immediately?
The substance that can create robots has been destroyed and history has been rewritten. T-800 should belong to a substance that has never been created, but it has not disappeared.
The line of the movie itself is: because there is still my chip. So t-800 bid farewell to everyone one by one, and entered the steelmaking pool by himself.
The logical meaning of this is: if t-800 does not destroy itself, humans may still obtain his chip and take the opportunity to learn technology. But this doesn't make sense. T800 can go back with Sara and John to live the lives of ordinary people. Apart from them, no one knows that t800 is a robot, let alone want to grab his chip. Why does he have to die?
There is another question. John is the child born to Sara from the future, so how can this child exist after the future is rewritten? As shown in the film, people in 1997 could not go back to the past, and it was impossible for John's father to go back and meet Sara, and it would be impossible for John to be born.
I thought that at the end of 2 when the chip and arm were destroyed, both the child and t800 would disappear. They would reluctantly bid farewell to Sara and sacrifice themselves to save the world.
Who knows the theory of time travel, come and explain to me.
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