Generalized probability rules from a timeless formulation of Wigner’s friend scenarios / Papers QISS1 / By Qiss Veronika Baumann, Flavio Del Santo, Alexander R. H. Smith, Flaminia Giacomini, Esteban Castro-Ruiz, Caslav Brukner IQOQI IQOQI Vienna Preprint: 1911.09696Journal: Quantum 5, 524 (2021)