CONCEPT
Perceptronium
Tegmark's speculative proposal that consciousness may be a distinctive state of matter—characterized by specific information-processing properties—rather than a mysterious supernatural phenomenon.
Perceptronium is the term Tegmark coined for the hypothesized state of matter whose information-processing characteristics constitute consciousness. The proposal, developed in the 2014 paper 'Consciousness as a State of Matter' and elaborated in Life 3.0, is that conscious experience is not a mysterious substance existing outside physical law but a pattern—a specific kind of information integration occurring when matter is arranged in particular ways. The pattern is substrate-independent in principle, meaning carbon-based neurons are not the only possible medium; other substrates could in principle support the same pattern. But the pattern is also specific: not every arrangement of matter that processes information produces consciousness, and identifying which arrangements do is an empirical question current science cannot fully answer.
In The You On AI Field Guide
Perceptronium operationalizes the move Tegmark has spent his career making: treating consciousness as a physics problem rather than a philosophical mystery. The proposal builds on Tononi's Integrated Information Theory, which identifies consciousness with mathematically precise information integration (phi). Perceptronium extends IIT's framework by asking what physical conditions