QBians Do Not Exist

TL;DR

This paper clarifies misconceptions by contrasting Earman's critique of quantum Bayesianism with the actual QBism interpretation, showing they are largely unrelated in practice.

Contribution

It highlights the significant differences between Earman's critique and the QBism interpretation, emphasizing their lack of connection.

Findings

Earman's critique does not accurately address QBism.

QBism and Earman's interpretation are largely unrelated.

The paper clarifies common misconceptions about QBism.

Abstract

We remark on John Earman's paper ``Quantum Bayesianism Assessed'' [The Monist 102 (2019), 403--423], illustrating with a number of examples that the quantum ``interpretation'' Earman critiques and the interpretation known as QBism have almost nothing to do with each other.