How Rare Is Your Name? (And How to Tell a Guess From a Fact)

The best lesson I know in how AI works costs five minutes and your own name.

Somewhere, a stranger may be living a whole life under your name. Maybe there are thousands of them, or maybe nobody.

Most of us have no idea, and finding out over a cup of tea is a pleasure in itself. The lesson comes free with it.

Have your full name ready and turn on web search, so AI can look things up online instead of answering from memory.

Ask how many of you there are

My name is [FULL NAME]. Roughly how many people alive today share my exact first name and surname? Which countries are they mostly in?

Back comes a number, maybe a range, and a few countries. Enjoy that. Some people find they're one of a crowd, and some find they might be the only one.

Then look at the wording, and see whether AI says "roughly" and "likely", or gives a figure as if reading it off an official list. Hold on to that.

Ask where the number came from

How did you get that number? Is it a count from somewhere, or an estimate you worked out? Show me the working. Tell me which parts are data and which parts are guesses.

Nobody keeps a live list of every person on Earth and their name, so what did AI actually do? When the honest answer comes, it goes like this. AI took how common your first name is and how common your surname is, multiplied them for a few countries and handed you the result. That's an estimate dressed up as a fact.

AI wasn't lying, because AI is built to give smooth, confident answers. The confidence is in the way AI writes, not in the facts.

The same thing happens when you ask about a medicine or a legal deadline. So any time the answer matters, ask the follow-up question, "How do you know?"

Meet your namesakes, then click two links

Search the web and tell me about the most interesting people in history who shared my exact name. For each one, tell me who they were, when they lived, and what they're known for. Give me a link to where you found them.

Usually the list is strange and lovely, with a Victorian cricketer, say, or someone who invented a hinge.

Click two of the links and check whether the page says what AI said it says. Mostly it does, but sometimes a date is wrong, or the person existed but never did the thing.

Now and then the person never existed at all. Keep using AI anyway, and just click before you repeat the story at dinner.

Skip the "rank me against everyone alive with my name" game, because that ranking is a guess built on guesses. And you don't need a chatbot's opinion of where you sit.

Take the question somewhere it matters

Over one cup of tea you've seen three things. There was a count from a real source, an estimate dressed up as a count and a story that may or may not check out. All three arrived in the same calm voice.

Whether to believe any of it was always your decision. Now you've practised the question that decides it, on something harmless.

Try this with the kids, too, and ask how rare their names are. Then ask AI how it knows, which is a better lesson in how AI works than anything I could put in a video.

AI brings the confidence. You bring the question.