  In this paper, we show that Quantum Mechanics does not admit ontological
models, in the sense that the quantum state of a system cannot correspond to a
set of physical states representing the independent reality of the system. We
show, via two thought experiments based on the Wigner's friend scenario, that
if the ontic state of physical systems in the lab is the same for Wigner and
for his friend, one of the following will be violated: PBR theorem,
Quantum-theoretic predictions, and the "No-superdeterminism" assumption.
