Doraemon: As clumsy as Nobita, no matter how many times he travels in time, he cannot change the past or present.
Doraemon is probably the childhood of many of us.
And one of them, the detail that forms the backbone of the entire story, is the time travel element.
Right from the first short story chapter, the author mentioned a rule about time travel.
Why is that, you can learn about the `grandfather paradox` – a theory mentioned by many movies about time travel (in Avengers Endgame there is a brief explanation about it).
So why did Doraemon return to the past?
Sewashi then explained that from event A to event B there will be many situations similar to going from Japan to Hawaii.
This is proven in the next chapter when Nobita wants to go to Shizuka’s house to play. In the predetermined future, on the way, he is hit by a car, causing serious injuries.
Another example, when Nobita had an assignment to talk about his ancestors, he asked his ancestor if he had any outstanding achievements and received the answer that his ancestor was very good at guessing.
There are many other adventures into the past in the story, but the result is still the same.
