Before revision:  One of their main conclusions is that the brain operates at criticality in specific regimes. To prove this point, they developed a test (hereafter, "Fontenele test") for criticality, which they indicate to rely on our own theoretical result. However, the results we established do not provide necessary and sufficient conditions for criticality , and cannot be extrapolated to derive a test for criticality. Moreover, the authors did not include any control applying the Fontenele test to non-critical systems , to assess possible differences with the experimental data. We propose here two such controls, and show that the Fontenele test can misclassify as critical these non-critical systems .
After revision:  One of their main conclusions is that the brain operates at a critical point, a processus known as URLanized criticality. A recent paper found remarkable scalings suggestive of criticality in systems as different as neural cultures, anesthetized or awake brains. We point out here that the diversity of these states would question any claimed role of criticality in information processing. Furthermore, we show that two non-critical systems .