Such a picture was abhorrent to Einstein, who believed that there must indeed be an objective physical world, even at the minutest scale of quantum phenomena. In his numerous arguments with Bohr he attempted (but failed) to show that there were inherent contradictions in the quantum picture of things, and that there must be a yet deeper structure beneath quantum theory, probably more akin to the pictures that classical physics had presented us with. Perhaps underlying the probabilistic behaviour of quantum systems would be the statistical action of smaller ingredients or ‘parts’ to the system,
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