  A classification of different interpretations of the quantum formalism is
examined and the concept of perspectival interpretation is presented. A
perspectival interpretation implies that the truth is relative to the observer.
The degree to which QBism and Convivial Solipsism are perspectival is examined
and Convivial Solipsim is shown to be perspectival at a higher degree than
QBism or at least than the QBism founders version.

Quantum Physics;History and Philosophy of Physics