Fields, Chris2012-03-292012-03-292012-03-291863-7388http://hdl.handle.net/2003/2940210.17877/DE290R-3376Quantum Bayesianism (``QBism'') has been put forward as an approach to quantum theory that avoids foundational problems by altogether disavowing the objective existence of quantum states. It is shown that QBism suffers its own versions of the familiar foundational problems, and that these QBist versions are illuminating not just for QBism, but for more traditional foundational approaches as well.enPhysics & Philosophy ; 18Decomposition into systemsFoundations of Quantum MechanicsQuantum BayesianismQuantum DarwinismQuantum informationQuantum-to-classical transition100530article (journal)