Inception helmet creates alternative reality

Christopher Nolan’s 2010 blockbuster Inception is set in a distant future where military technology enables one to infiltrate and surreptitiously alter other people’s dreams. Leonardo Di Caprio plays Dom Cobb, an industrial spy tasked with planting an idea into the mind of a powerful businessman. The film has a complex, layered structure: Cobb and the other characters create dreams within dreams within dreams, but they cannot distinguish between reality and the dream states they fabricate.

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