The presence of an authoritarian government and strong censorship are realistic aspects of this story. On the other hand, Juan's attitude of censoring his letter is something that seems unreal and a nightmare.
We can arrive at this answer because:
To prevent this from happening, Juan decides to work in the government's censorship department, to be able to send his letters. But he becomes so dedicated to the work that he censors his own letter without thinking twice.
This behavior is unrealistic and it seems like a nightmare to think that a government can control people to the point where they ignore their feelings and desires to maintain the control of the government.
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