Comment on Chiribella et al., Phys. Rev. Lett. 132 (2024) 190201, arXiv:2301.10885

The article Bell Nonlocality in Classical Systems Coexisting with Other System Types' by Chiribella et al. defines classical’ in a quantum context in a way that ignores noncommuting quantum projectors, and is hence inconsistent with Hilbert-space quantum theory.