The Computer Said Yes. Petrov Said No.

On 26 September 1983, a computer system told Stanislav Petrov that the United States had launched nuclear missiles at the Soviet Union.

The system was doing exactly what it had been designed to do.

The warning was clear.

The consequences of ignoring it could have been catastrophic.

Petrov decided the computer was wrong.

He was right.

More than forty years later, businesses are handing increasingly important decisions to systems they barely understand. AI recommends what we should write, buy, approve, believe and do next. Automated systems flag fraud, assess risk, prioritise customers and increasingly influence decisions that once belonged entirely to people.

And when the system produces an answer with enough confidence, humans have a remarkable tendency to assume it must know something they do not.

In this keynote, Tom Reveley uses the extraordinary story of Stanislav Petrov as the starting point for a much bigger question about the relationship between people and technology.

Technology can process more information than we ever could. AI can find patterns we would miss. Automation can make businesses faster, more efficient and more consistent.

But none of that removes human responsibility.

The danger begins when assistance becomes authority and nobody feels confident enough to challenge the machine.

This is not an argument against AI or automation. It is an argument for judgement.

Because sometimes the most important thing a person can do is look at what the computer is telling them and say:

That doesn't make sense.