Von Neumann’s ‘No Hidden Variables’ Proof: A Re-Appraisal

  title={Von Neumann’s ‘No Hidden Variables’ Proof: A Re-Appraisal},
  author={Jeffrey Bub},
  journal={Foundations of Physics},
  • J. Bub
  • Published 2 June 2010
  • Philosophy
  • Foundations of Physics
Since the analysis by John Bell in 1965, the consensus in the literature is that von Neumann’s ‘no hidden variables’ proof fails to exclude any significant class of hidden variables. Bell raised the question whether it could be shown that any hidden variable theory would have to be nonlocal, and in this sense ‘like Bohm’s theory.’ His seminal result provides a positive answer to the question. I argue that Bell’s analysis misconstrues von Neumann’s argument. What von Neumann proved was the… 

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