They are opposing ideas, so yes. A dream is NOT reality and vice versa. Yes the phrase is an oxymoron.
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Frist you need to make a your story with all of that and i have been there but you have to make your story with a beginning then after that you will need to make you middle part of your story then you do the rising action then the falling action then the climax the the end.
Answer:
Mutations in plants or animals are referred to as Deviations, which are immediately destroyed once they are discovered. A human with a genetic mutation is labeled a Blasphemy and sent to the Fringes of society, where they struggle to survive among other individuals with mutations or deformities.
If not mistaken
Hope this helped:)
Flashbacks are used to recount events that happened before the story's primary sequence of events to fill in crucial backstory.