Very simple explanation of Wigner's friend needed

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The discussion centers on Wigner's friend thought experiment, which illustrates the complexities of quantum mechanics and the nature of reality. Researchers have explored how different observers can perceive distinct realities based on their measurements. The experiment highlights the implications of quantum mechanics on our understanding of consciousness and observation. For further insights, users are directed to existing threads on Physics Forums that delve deeper into the topic.

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Hi, just browsed through some news stories and saw a story about a group of researchers who seemed to prove we can experience very different realities. I was just wondering if anyone could provide a simple explanation of their experiment and what they did? Do we really live in different realities?
 
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