Irreducibly Human

What AI Can and Can't Do

There is a set of cognitive capacities that machines cannot reliably perform — and that no standard curriculum teaches systematically. Irreducibly Human names them in a seven-tier taxonomy, teaches them, and tests the claim against real labor data. The argument evolves through conversation with conversational AI. What you're looking at is the working document, not the finished product. That's the point.

The Idea

Human intelligence, organized into seven tiers by how far machines have reached into each. Three tiers where machines compete or convincingly imitate. Four — highlighted — where they have not arrived. Those four are the curriculum.

Tier 1 — Pattern & AssociationMachines: superhuman
Tier 2 — Embodied & SensorimotorMachines: improving, bounded
Tier 3 — Social & PersonalMachines: simulacra only
Tier 4 — Metacognitive & SupervisoryMachines: weak
Tier 5 — Causal & CounterfactualMachines: unreliable
Tier 6 — Collective & DistributedMachines: absent
Tier 7 — Existential & WisdomMachines: absent

The First Instrument

The AI Exposure Explorer

The tiers are a claim, and claims should be testable. The Explorer is the first real tool built to look: pick any two occupations and compare their employment trends against major AI milestones, then compare the human abilities each job leans on — and ask which of those abilities machines have actually reached.

Built by Abisha Vadukoot, Milivoje (Mickey) Davidovic, and Nik Bear Brown, with data from O*NET and the U.S. Bureau of Labor Statistics (BLS).

OPEN THE EXPLORER

Bear Brown & Company

Irreducibly Human is a production of Bear Brown & Company. For questions about the series, reach out directly.