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As one of the original architects of quantum theory, perhaps our most successful scientific idea, you would think that Niels Bohr would have been interested in the nature of reality. The subjects of his studies were atoms, electrons, photons – the things we think of as the fundamental ingredients of the universe.
But for Bohr, reality was actually none of his business. “It is wrong to think that the task of physics is to find out how nature is,” he said in an often-repeated quote from the early days of quantum theory. “Physics concerns what we can say about nature.”
Though…
