We've all heard about AI "hallucinations" - those moments when an AI confidently states something that's just plain wrong. Take Google's Bard AI, for instance. During its first public demo in February 2023, it confidently (and incorrectly) stated that the James Webb Space Telescope took the first pictures of a planet outside our solar system. This single error caused Google's parent company Alphabet to lose $100 billion in market value. Or consider the case of two lawyers who were fined $5,000 for submitting fake court citations generated by ChatGPT, highlighting the risks of relying on AI-generated information without proper verification.
These high-profile mistakes have led many to view AI hallucinations as a critical flaw. In fact, a recent Forrester Consulting survey found that more than half of AI decision-makers cite hallucinations as a key factor holding back broader AI adoption in their organizations. Some professionals, particularly in fields like law and academia, are using these incidents as justification for avoiding AI altogether.
But what if we're looking at this all wrong? What if these "hallucinations" aren't bugs, but features? In fact, some researchers argue that the term "hallucination" itself is a misnomer, carrying an undeservedly negative connotation that fails to capture the nuanced and often beneficial nature of this phenomenon.
Do you use spell checking?
Let's take a step back and consider something we use every day: spell-check. We've all had that moment when spell-check suggests a wildly inappropriate word — "meeting" turns into "meatball," "presentation" into "fermentation." But we don't throw up our hands and swear off spell-check forever. We chuckle, ignore the odd suggestion, and keep typing.
AI hallucinations work the same way: side effects of a powerful tool trying to make sense of ambiguous or incomplete information, not errors to be eliminated outright. Imagine if every time you asked an AI a question, it answered with a hundred clarifying questions first. Instead, it makes an educated guess to fill the gap and gives you something coherent to work with.
The Power of Filling in the Gaps
One of the most valuable features of large language models is the ability to work with incomplete information. Far from being a flaw, it lets AI handle a wide range of tasks with minimal input — useful in real-world situations where perfect information is rarely available. Without it, an LLM would need painstakingly specific detail before it could respond at all, turning simple tasks into frustrating, drawn-out interactions.
The two conversations below show the difference. In the first, the LLM fills in missing information on its own. In the second, it insists on every detail before proceeding.
An LLM glossing over details
The first version understands the request and fills in common-sense gaps without demanding every detail — what we expect from an AI that's actually useful to work with. Here's what it looks like when it can't.
An LLM requiring all details first
This second conversation shows how impractical it would be if LLMs couldn't "fill in the gaps." Every interaction would turn into a drawn-out interrogation, requiring the user to supply details that the model could easily infer or improvise.
Harnessing AI's Reconciliation Ability
Understanding this changes how you should treat AI output. When you interact with an AI, you're not retrieving pre-stored information — you're engaging with a system actively making sense of your query, often by guessing at missing details. So treat responses as a starting point for further investigation rather than a definitive answer, and verify crucial information when accuracy matters.
That means training people to recognize when an AI is filling in a gap, not just how to prompt it. Verification isn't about "catching" AI mistakes — it's a normal step in the workflow, the same as reviewing a colleague's draft. Combine the AI's ability to process and connect information quickly with human judgment, and you get results neither could produce alone.
Bridging Information Gaps
Recent research suggests hallucinations aren't one thing — they can be categorized into different types, some with real benefits. What we might label a hallucination could be an example of creative inference or a novel combination of existing knowledge, the same processes behind human creativity and problem-solving.
None of that means accepting everything an AI produces at face value. It means treating gap-filling as a known behavior — one you plan for with verification, not one you eliminate. The same instinct that makes spell-check useful once you understand its limits applies here: know where a model is likely to guess, and check the guesses that matter.