Nathan M. Thornhill is an independent researcher working at the intersection of complexity science, information theory, and consciousness studies. His work circles one deceptively simple question: what separates the systems that persist from the ones that dissolve?
His Existence Threshold framework attacks it through measurable information dynamics — integration, differentiation, and the balance between them. The framework has predicted pattern persistence in cellular automata with 100% accuracy and uncovered a consistent ~86% information-retention law at dimensional boundaries, validated across roughly 1,500 patterns and two neural networks…
Nathan M. Thornhill is an independent researcher working at the intersection of complexity science, information theory, and consciousness studies. His work circles one deceptively simple question: what separates the systems that persist from the ones that dissolve?
His Existence Threshold framework attacks it through measurable information dynamics — integration, differentiation, and the balance between them. The framework has predicted pattern persistence in cellular automata with 100% accuracy and uncovered a consistent ~86% information-retention law at dimensional boundaries, validated across roughly 1,500 patterns and two neural networks. Its dynamic extension classifies human consciousness states from EEG with 91% accuracy across more than 136,000 recordings.
His most recent work turns the framework on itself, and on the field. A single substrate-neutral scalar of the kind routinely proposed as a sufficiency index for consciousness is, he shows, content-blind by construction: a photograph, white noise, and the word "TRUE" can carry an identical score. The Recursive Existence Threshold locates what that number throws away. Across three substrates (a transformer, the anaesthetized brain, and sleep), the information that tells one state from another lives not in any scalar but in multiply-realizable relational structure. The conclusion is sharp and, he argues, unavoidable: a sufficiency predicate for a mind cannot be a single global number.
Six published papers, a new preprint under review, four U.S. provisional patents, one framework — collected in Foundations of the Existence Threshold paperback and ebook.
Thornhill is entirely self-taught; his prior career spans healthcare, from nursing assistant to hospital administration. He runs a technology consultancy in Fort Wayne, Indiana, and when he's not researching, he's playing guitar, gardening, or spending time with his wife and daughter.
