Von Neumann was not a Quantum Bayesian

@article{Stacey2016VonNW,
  title={Von Neumann was not a Quantum Bayesian},
  author={Blake C. Stacey},
  journal={Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences},
  year={2016},
  volume={374}
}
  • Blake C. Stacey
  • Published 7 December 2014
  • Philosophy
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Wikipedia has claimed for over 3 years now that John von Neumann was the ‘first quantum Bayesian’. In context, this reads as stating that von Neumann inaugurated QBism, the approach to quantum theory promoted by Fuchs, Mermin and Schack. This essay explores how such a claim is, historically speaking, unsupported. 
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