At the Edge of Human Projection

In previous work, we defined waking consciousness as the continuous predictive modeling of an autobiographical self against an external sensory stream through a localized biological interface. In this paper, we map the extreme boundaries of this neurostructural geometry. We demonstrate that coma, brain death, and the oceanic/mystical experience are not anomalies, but structural states defined by the varying degrees of coupling between the self-model and the biological hardware. In coma, the brain remains metabolically tethered to the physical world, but deprived of hippocampal temporal recording, the self-model loses its localized “thick present” and enters a state of temporal stasis. In brain death, the thermodynamic tether is permanently severed, and the localized neural network dissolves into the broader thermodynamic continuum. In the oceanic feeling, the rigid boundaries of the self-model temporarily dissolve—correlated with the deactivation of the Default Mode Network (DMN)—allowing the localized interface to experience pure, non-local resonance with its environment. By mapping these edges, we complete the geometry of the mind and demonstrate how to differentiate a true integrative mystical experience from a pathological ghost.