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Infographic 01 · Floor 1 to 4 · cross-cutting · v1.0 · 2026-08

The question: Which floor does each idea live on?

Each floor adds what the one below cannot do

AI is understood in four floors: the model, the harness, the agent, the organisation. To see it, all you have to do is follow one ordinary request and watch what each floor makes of it. Four contributions, none of them interchangeable.

The request« Book me a train to Lyon on Thursday morning. »It does not change from one floor to the next. What changes is what the floor makes of it.

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Choose a floor

The model takes in text and produces text. It understands your sentence, knows what a train ticket is, and can write a perfectly credible confirmation. But it consults no real timetable: with no memory and no access to the world, it predicts. It is this raw capability, and this alone, that every floor above comes to equip.

What lives on this floorEverything that describes the machine itself: its training, its capabilities and its limits.

Predict, equip, loop, govern: four contributions, none of them interchangeable. To place any idea in AI, ask which of those jobs it belongs to. Every entry in this glossary carries the badge of its floor: this infographic is the map.

Glossary terms

lexigraph.org · The Elevatorv1.0 · 2026-08 · CC BY 4.0

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