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The “Doubt and Cross-Validate” Protocol: Why We Must Always Question AI

There is no contradiction between deeply believing in AI’s potential for human development and being cautious about trusting it.

What happens when the model is wrong? How quickly can we detect the error, and how much damage can occur before we intervene? That is the logic behind doubt and cross-validation protocol, and it should guide everyone’s relationship with artificial intelligence (AI), whether you are a head of state, a hospital administrator, a small business owner or someone asking a chatbot for advice on a personal decision.

From algorithmic trust to verification as a habit

We should stop treating AI systems as if they were infallible oracles. They are best managed like an exceptionally capable junior analyst: fast, productive, sometimes remarkably insightful, but never unsupervised when the consequences are significant.

That requires building verification into our use of these tools.

Where speed is not critical, humans must remain an active verification layer, bringing contextual knowledge, ethical judgment, accountability and the authority to challenge or reject AI recommendations when stakes are high.

Verification is infrastructure, not overhead

It is tempting for institutions and individuals to treat verification as friction that slows things down. That is the wrong way to think about it. If an AI system can produce false positives, false negatives, hallucinations,or distributional errors, the mechanisms for catching those failures are part of the system itself, not an add-on.

Anyone relying on AI for consequential decisions should ask not only how accurate it is but also where it fails, who bears error rates, how uncertainty and out-of-domain cases are handled, who can override it and how errors are recorded and learned from. Verification is not the enemy of efficiency; it is the infrastructure that makes responsible efficiency possible.

Understand four pillars: data, algorithms, compute, application

AI should not be treated as a single, indivisible technology, whether you are governing, deploying or simply using it. At a minimum, every user should be able to interrogate four interconnected pillars:

Data — Who owns it? Who controls it? Who is represented, and who is missing? How was it collected, labeled, stored and governed?

Algorithms — What objectives are being optimized? What assumptions are embedded in the model? How is uncertainty measured? How does the system behave outside its expected distribution?

Compute — Who controls the infrastructure required to train, deploy, and operate these systems? Where is it located? What dependencies or strategic vulnerabilities does it create?

Application — What decision is the AI influencing? Who is affected? What happens when it fails? What mechanisms exist for appeal, correction and accountability?

Focusing exclusively on the model can lead to overlooking vulnerabilities elsewhere in the system. Responsible AI use requires examining the entire system, not just the model at its centre.

Literacy Is the precondition for meaningful oversight

Zero trust without technical literacy produces paralysis; technical literacy without skepticism produces overconfidence. What we need is informed scepticism.

Not everyone needs to be a machine-learning engineer, but anyone relying on AI for consequential decisions needs enough understanding to ask: What data trained it. What assumptions and objectives shape it? Where does it fail? Has it been independently tested? Is my situation different from its training conditions?

The ability to ask these questions is becoming a basic requirement for AI citizenship, professional competence, and leadership

The Paradox: trust it enough to use it, never enough to obey it

There is no contradiction between deeply believing in AI’s potential for human development and being cautious about trusting it. In fact, these positions reinforce each other.

AI does not need to be perfect to create enormous value, especially in resource-constrained environments. An agricultural sensor that is less accurate than a laboratory can still transform farming if the alternative is no measurement at all, provided users understand that its output is an estimate, not a certainty.

Suggested citation: Tshilidzi Marwala. "The “Doubt and Cross-Validate” Protocol: Why We Must Always Question AI," United Nations University, UNU Centre, 2026-08-12, https://unu.edu/article/doubt-and-cross-validate-protocol-why-we-must-always-question-ai.

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