How to Fact-Check What an AI Tells You

Artificial intelligence assistants like ChatGPT, Claude, and Microsoft Copilot are useful but imperfect tools. They are computer programs that read enormous amounts of text from the internet and then guess the most likely next word in any answer. Most of the time their guesses are right. And they sound confident, polite, and well-organized. Sometimes their guesses are wrong, and the wrong answer comes out sounding exactly as confident as the right answer. Computer scientists call this problem hallucination. The AI is not lying on purpose. It has no idea it is wrong. Your job, as the person reading the answer, is to know when to trust it and when to check.

Fact-checking an AI answer is a habit, like looking both ways before crossing the street. Once you have done it a few times, it becomes second nature. The good news is that fact-checking does not require any technical skills, only knowing where to look. Different kinds of facts have different trusted sources. Medical questions belong to medlineplus.gov or your doctor. Legal questions belong to your state attorney general's website. Tax questions belong to irs.gov. Current events belong to apnews.com or reuters.com. Historical facts belong to encyclopedias and government archives. This guide shows the five-step process that works for any AI answer, plus a list of trusted sources for the most common senior topics.

When should you fact-check an AI answer? Always, if money, health, safety, or legal rights are involved. Sometimes, if you are curious or sharing the answer with someone else. Rarely, if the answer is harmless and the topic does not matter much, like "What is a fun word for a happy mood?" The bigger the consequences of being wrong, the more important the fact-check. A wrong word in a thank-you note costs nothing. A wrong dose of a medication can land you in the hospital. A wrong phone number for the IRS can lead you to a scam call center pretending to be the government.

Before you begin, have a notepad and pen handy, along with the AI answer you want to check. Open a fresh tab in your web browser so you can look things up alongside the AI window. Set aside about ten to fifteen minutes for a thorough check on an important answer. If the answer is about something serious, like a medication, a financial decision, or a legal question, also plan to talk to a real human expert before acting on what the AI told you. AI is a starting point for research, not the final word.