Is there a classical model of Wigner's friend?
arXiv:2111.02807
Abstract
"Wigner's friend" refers to a quantum process of which different observers, following the rules of quantum mechanics, give contradictory descriptions. Lostaglio and Bowles have recently claimed to describe a classical system showing the same effect. It is argued that this claim is not justified. it fails to take into account the different meanings of probability in classical and quantum mechanics.
4 pages, comment on arXiv:2101.11032. Significant addition to the argument