How to Fact-Check

A practical habit, not a burden.

What you'll leave with

By the end of this lesson, you'll have an efficient, sustainable fact-checking practice for AI content — targeted at high-stakes claims without making every AI interaction a research project.

Why this matters

Fact-checking AI does not mean verifying every sentence. It means knowing which claims matter enough to check, and having a simple habit for doing it quickly.

The idea

Not all claims are equal. The effort a claim warrants depends on its stakes and reversibility.

The teaching block

The fact-checking hierarchy:

• Low stakes, easily reversible: no verification needed. If AI suggests a recipe variation and it tastes bad, the cost is one dinner.
• Medium stakes, somewhat reversible: quick check. A statistic you are about to cite in an email, a date you are putting in a document.
• High stakes, hard to reverse: careful verification using primary sources. Medical decisions, legal questions, significant financial decisions, anything you are publishing or presenting as fact.

Practical fact-checking methods:

• Web search: the most common and fastest method. Search the specific claim, not just the topic.
• Primary sources: for medical, legal, or scientific claims, go to the original source — not another AI summary.
• Ask AI to admit uncertainty: try "How confident are you about this? What are you uncertain about?" AI sometimes flags its own weak areas when asked directly.
• Cross-reference: if two independent reliable sources confirm a claim, it is likely accurate.

One underused technique: ask AI to help you fact-check itself.

• "What would I search to verify this?"
• "What sources would a journalist use to confirm this?"

AI can often give you a roadmap for checking its own work.

For citations specifically: always search the title of any paper or book AI provides before using it. It takes ten seconds and prevents the embarrassment of citing something that does not exist.

Example

Take a claim AI has made — ideally a specific statistic or citation. Show the process of checking it: search the exact claim, evaluate the source, confirm or disconfirm.

If you can find a hallucinated example, showing the not-found result is more instructive than finding a true one.

Try this now

Find any specific claim AI has made during this course — a statistic, a date, a reference. Take 60 seconds to check it using a web search.

The goal is not to find an error. The goal is to make the habit feel easy and fast so it becomes automatic.

Save this

Quiet takeaway

Checking facts is now a simple habit. Targeted, fast, and proportionate to the stakes. Not a burden — just a brief pause on the things that matter.

Next

Checking facts is now a simple habit. Lesson 5.4 addresses a different category of risk: when AI does not have the information at all because it is too recent.