Before revision:  Deploying a novel, subsampling-invariant estimator, we find that in vivo dynamics do not comply with either hypothesis , but instead occupy a narrow "reverberating " state consistently across multiple mammalian species and cortical areas.
After revision:  Deploying a novel, subsampling-invariant estimator, we fit and carefully validate a minimal model for cortical spike propagation. The model interpolates between two prominent states: asynchronous and critical. We find neither of them in cortical spike recordings across various species , but instead occupy a narrow "reverberating " state consistently across multiple mammalian species and cortical areas.