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How to Fact-Check AI-Generated Content

How to Fact-Check AI-Generated Content

How-To

A step-by-step guide to verifying AI-generated content, including how to catch fabricated citations, outdated facts, and unsupported claims.

AI text can sound completely authoritative while being wrong. Here’s how to actually check it, framed around the questions people usually get stuck on.

Do I need to check everything?

No. General explanations of established concepts are lower-risk. Specific numbers, dates, quotes, and citations are exactly where hallucinations concentrate. Spend your effort there.

What about citations specifically?

Never trust one without checking it exists. Models can generate a complete, plausible-looking citation, author, journal, year, describing a paper that isn’t real. Search for the actual source and confirm it says what’s claimed.

Does search grounding solve this?

It helps. Models with live web search, like Gemini’s Search integration, are meaningfully more reliable for current facts, but still worth checking, since sources themselves can be misread or misapplied.

What’s the single best habit here?

Cross-check anything surprising or unusually convenient against an independent source before using it. Confirmation bias applies to AI output the same way it applies to everything else you read, and checking the date matters too, since a model can state something that was true at its training cutoff but has since changed.

See the International Fact-Checking Network for general verification standards.

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10 Common AI Prompting Mistakes

10 Common AI Prompting Mistakes

Prompt Engineering

The most common AI prompting mistakes people make, and specific, practical fixes for each one, from vague constraints to accepting the first answer.

Five mistakes account for most of the disappointing AI output people complain about. None of them are about the model being bad.

Asking for the destination without the constraints

“Write a product description” leaves the model guessing at length, tone, and audience. State the constraints upfront. Our full prompt engineering guide has the reusable template for this.

Accepting the first answer

Starting over with a longer prompt throws away the model’s biggest advantage: it remembers the conversation. “Make the second paragraph shorter” beats a rewrite from scratch.

Trusting specifics without checking

Models hallucinate most on exact statistics, citations, and recent events, precisely the details that sound most authoritative when wrong.

Cramming a multi-step task into one message

Research, outline, draft, and polish in one prompt tends to produce a mediocre version of all four. Break it into stages and review each before the next.

Describing style instead of showing it

“Professional but friendly” means something different to every reader. Paste an example of writing you like and ask it to match that.

Most of these cost one extra sentence of context. That’s a small price for consistently better output.

See Anthropic’s own prompt engineering documentation for more depth.