[Fis] A curious tale and QBism

[Andrei Khrennikov]

     Dear Hans,
Thank you for mentioning QBism. It can be treated as the quantum alternative for classical Bayesian inference. 
In this connection, it is good to mention that classical Bayesian PU suffers of  the well known Cromwell problem: if prior probability is zero it would always be zero, 
if it is 1 it always be 1... 

Quantum update of probability does not suffer of this problem, zero probability can be updated to nonzero, the same  can happen for the probability one. 

See our paper in attachment, it was published in Journal of Mathematical Psychology.
yours, andrei
________________________________________
From: Fis [fis-bounces at listas.unizar.es] on behalf of Hans von Baeyer [henrikritter at gmail.com]
Sent: Thursday, February 02, 2017 4:32 PM
To: fis at listas.unizar.es
Subject: [Fis] A curious tale and QBism

Thank you Pedro for mentioning my new book.

Actually, there is a connection between my book and the curious tale.  QBists look at the future as a web of interlaced personal, numerical probability estimates, with no certainties anchored in REAL mechanisms.  The probability that CERN will blow up the world is small enough to be negligible for most people, but not for all.  The thing QBists reject as in principle unattainable is ABSOLUTE certainty, which many lay people and some physicists (Einstein was among them) continue to long for.

Hans Christian von Baeyer

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