On the Reality of the Quantum State Once Again: A No-Go Theorem for \(\psi\)-Ontic Models?

In a recent paper (Found Phys 54:14, 2024), Carcassi, Oldofredi and Aidala concluded that the \(\psi\) $\psi$ -ontic models defined by Harrigan and Spekkens cannot be consistent with quantum mechanics, since the information entropy of a mixture of non-orthogonal states are different in these two theories according to their information theoretic analysis. In this paper, I argue that this no-go theorem for \(\psi\) $\psi$ -ontic models is false by explaining the physical origin of the von Neumann entropy in quantum mechanics.