The finding that should frame the conversation
A preregistered meta-analysis of 106 experimental studies and 370 effect sizes, published in Nature Human Behaviour, found that human and AI combinations performed significantly worse on average than the better of the human alone or the AI alone, at a Hedges' g of minus 0.23, with the losses concentrated in decision-making rather than in content creation.
Two limits travel with it, and they are stated on stage rather than left out. The comparison is against an oracle who always picks the better performer, which nobody can do in advance. And the studies were published between 2020 and 2023, so the analysis predates the current generation of models. It is an argument against assuming the pairing is free, rather than proof it cannot be made to pay.
What happens to a person, measured
Endoscopists averaging twenty-eight years of experience saw their unassisted detection rate fall from 28.4 to 22.4 per cent after routine exposure to an AI tool, measured on procedures performed without it. Students with unrestricted GPT-4 scored 48 per cent higher while they had it and 17 per cent below a control group once it was removed.
The room usually goes quiet at the second one, because a guardrailed tutor in the same experiment largely removed the harm. Same model, different interface, opposite outcome. That is the whole argument: the design of the relationship decides whether the tool raises capability or quietly spends it.
What the keynote gives a leadership team
A way to see which mode the organisation is running. Most teams do not decide how much judgement to hand over; it moves on its own, one reasonable step at a time, until nobody is sure which decisions are still theirs. The signature keynote, Drift versus Design, sets the choice out and hands the room the controls.
Then the working artefact: which decisions stay human, which the machine may take, and who remains accountable, written down rather than settled by whoever is busiest that afternoon. That is at the delegation boundary map, and the board version at what a board should ask about AI.
Why it is not an ethics or responsible-AI talk
The distinction is deliberate. This is about adoption and capability rather than compliance: where judgement should stay in the workflow and how to keep it strong, not model safety, regulation or what the law should say. The operational side of oversight has its own page at human oversight and accountability.
The risks named along the way have their own research: synthetic seniority, the missing rungs, and the accumulation of unexercised judgement examined at capability debt.
The full argument, published
Everything above is set out at length, with every source graded and its limits stated, at does AI weaken human judgement: roughly 7,000 words, 515 graded sources, including the evidence that runs against the argument and where it remains uncertain. A booker who wants to know what will be said before the room fills can read all of it.
The three keynotes, and which fits this room
Keynotes run 30 to 90 minutes, in person or virtual. A 30-minute main-stage version of each talk is available for conferences, and the full talk runs 45 to 60 minutes. The sector examples change for the room; the argument does not. All three, with the showreel, are at keynotes, and the programme copy is at the speaker pack.
Drift versus Design
Drift versus Design: why most organisations hand their judgement to AI without deciding to, and how to design your way through instead.
Most organisations are adopting AI by drift: a thousand reasonable decisions that add up to judgement nobody chose to give away. Rahim Hirji, author of SuperSkills, shows leaders which mode they are running, where AI sharpens judgement and where it weakens it, and hands them the controls.
We Are Superheroes
We Are Superheroes: AI is the suit. The human decides.
AI makes everyone faster, stronger and more capable. It does not decide; people do. Through a family story across five generations and three continents, Rahim Hirji hands the audience the seven human skills that grow more valuable as the tools spread. They arrive thinking AI is the story and leave knowing they are.
WTH (What the Human)
WTH (What the Human): a live test of a board's own judgement.
Business is being rewired as AI arrives, and human judgement is leaving with it. In three acts, Rahim Hirji shows a board what AI is changing in how organisations run, then ends with a live test of the board's own judgement, in the room and in real time. Nobody forgets the result.
