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Quantum experiment suggests there really are ‘alternative facts’

The experiment could have immense implications for our understanding of the nature of quantum reality, which depends on how we interpret quantum theory. According to Fedrizzi and his colleagues, their work favours interpretations saying that the outcomes of experiments are subjective, such as quantum Bayesianism and Rovelli’s relational quantum mechanics.
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But Rovelli is thrilled. “I do take it as a great piece of evidence directly supporting the relational interpretation. I agree in full with the way they interpret it,” he says. “It is fantastic that ‘ideal experiments’ of the past become real experiments of today.”