Every AI Hallucination Explained Like You're 5

AI can give you an answer that sounds completely believable — and still be making it up. So what exactly is an AI hallucination, and why does it happen? In this video, we use one simple test to break down the major types of AI hallucinations. We start with a fictional company, give the AI a small set of facts, and then slowly make the questions harder. That's where things start to go wrong. You'll see what happens when AI changes a fact it was given, adds information that was never provided, invents people and relationships, makes up numbers and dates, and even creates sources and quotes that don't exist. We also break down terms like factuality hallucination, faithfulness hallucination, intrinsic and extrinsic hallucinations, entity hallucination, attribute hallucination, relation hallucination, numerical and temporal hallucinations, citation hallucination, reasoning hallucination, false-premise hallucination, self-contradiction, and hallucination snowballing. Some of these mistakes are easy to spot. Others are much harder. An AI might get the maths right while quietly making up one of the assumptions. It might confidently cite an article that was never written. Or it might accept something false in your question, build an answer around it, and then keep adding more made-up details until you have an entire story that never happened. That's what makes AI hallucinations so tricky. Wrong answers don't always look wrong. We also look at what AI should do when it genuinely doesn't know something, including abstention, grounding, and calibration — and why sometimes the best answer really is: “I don't know.” If you use ChatGPT, Claude, Gemini, Copilot, or any other AI assistant, this is one of the most useful AI concepts to understand. Because the question shouldn't just be: “Does this sound believable?” It should be: “What evidence do we actually have?” Subscribe to Now I Get It for simple explanations of AI, technology, cybersecurity, and all those technical terms that somehow became part of everyday life. #AI #ArtificialIntelligence #ChatGPT