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Sci-Fi films that require science to work
By this I mean there isn't a way to make an analogue of the story in a different, non-magical, genre as there is, say, with a film like Star Wars.
2001 (naturally)
Blade Runner (how could you do Replicants?)
Primer (techie time travel?)
I was thinking The Matrix but in a sense it could just be a prisoner having a lucid dream and then waking up and leading other prisoners in revolt.
Shit thread, sorry.