01 · The science
A formal ontology of health
A machine-checked mathematical definition of health — built over years, not a dataset or a heuristic. The genuinely hard part came before the mathematics: to formalize health, test it, and build instruments that measure it, someone first has to know what it actually is — not only human physical health, but health as such, across scale, from bird to bee, flower to tree, planet to star. That understanding is the category-defining asset — the deepest reason this is hard to reproduce, though far from the only one.