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Décryptage · 3 min

Hallucinations: why AI makes things up, and how we limit it

Friday, 20 March 2026← All articles

One day, you ask an AI for a piece of information. It answers with total confidence... and it's wrong. That's called a "hallucination". Rest assured: it's not malice, and it can be managed. Here's how.

Why an AI makes things up with such confidence

To understand, remember one simple thing: an AI doesn't "know". It predicts the most likely next word after the previous one, a bit like your phone's autocomplete, only far more powerful.

Its goal isn't to tell the truth. Its goal is to produce text that is plausible, that sounds right. Most of the time, plausible and true coincide. But sometimes they don't: the AI fills a gap with something that looks credible.

And since it always writes in the same assured tone, nothing in the style warns you that it's made up. A law reference, a date, a price, a quote: all of it can be fabricated out of thin air, without the slightest visible hesitation.

The AI doesn't lie. It guesses. The problem is that it guesses without ever appearing to doubt.

The real trigger: when you let it guess

An AI hallucinates mostly when it lacks information and is forced to answer anyway. Deprived of facts, it plugs the hole with something that sounds likely.

It's logical: ask a question about YOUR numbers, YOUR clients or YOUR pricing to an AI that has never seen them, and it will invent an answer that resembles the right one. The risk isn't inevitable. It comes from a lack of raw material.

The guardrails that genuinely reduce the risk

Good news: we know how to limit hallucinations. Not with magic, with method.

  • Plug it into your real data and your tools. Rather than letting it guess, connect it to your mailbox, your calendar, your CRM (your client file). It reads the real information instead of imagining it.
  • Ask for sources. "Where does this come from?" is a healthy question. An answer backed by a document you can check is worth a thousand confident claims.
  • Keep a human in the loop. The simplest and most effective move: read before acting. Especially for anything that leaves your company.

How chyll is built for this

With chyll, these guardrails aren't options to switch on: they're part of the machinery.

First, chyll works plugged into your tools (over a thousand one-click integrations, with per-tool permissions you can revoke). It relies on your real data rather than on assumptions. It also has a business memory: your context, described once and reused everywhere. Fewer gaps to fill, so less invention.

Second, you stay in control. For anything heading outside (an email to a client, a quote, a post), chyll prepares a draft and you approve before anything is sent. If a mistake slipped in there, you catch it before it goes out.

No AI is infallible, and you should treat it like a brilliant intern who's sometimes a bit too sure of themselves: useful, fast, but to be proofread. The difference lies less in a "zero errors" promise than in the safety nets around it. Plug the AI into reality, ask for its sources, approve before sending: you keep the AI's speed, without suffering its inventions.

Your business keeps running. Even when you don't.

chyll opens in waves. People on the list hear first.

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