Christof Koch, a leading figure in modern neuroscience, presented at the 15th Behind and Beyond the Brain Symposium organized by the Bial Foundation in April 2026 with a provocative question: what if the brain doesn't generate consciousness but merely filters or transmits it? The presentation challenges decades of neuroscience orthodoxy that assumes consciousness is a product of brain activity alone. The central tension of 2026 can be summarized as: as AI becomes behaviorally indistinguishable from conscious beings, the scientific evidence increasingly suggests that the substrate matters, that consciousness may be a property of biological matter itself, not merely its organization. If consciousness requires biological substrate, no digital system could ever possess it, regardless of its architecture or behavior.
If consciousness needs biology and not just organization, then the most sophisticated AI will always be a philosophical zombie in a meat suit's stead.