What is Hallucination?Hallucination kya hai?

🧸 Think of it likeAise samjho

Like a student who doesn't know the answer but writes a confident, made up one to fill the page.Jaise student ko jawaab nahi aata par page bharne ke liye confident hokar mann se likh deta hai.

📘 ExplainedVistaar se

LLMs generate plausible text rather than looking up facts, so they can invent citations, numbers or policies. Reduce it with grounding (RAG), instructions to say 'I don't know', citations, lower temperature for factual tasks, code checks, and human review for high stakes. Measure the hallucination rate with evals.LLMs facts dekhne ke bajaye sahi lagne wala text banate hain, isliye citations, numbers ya policies gadh sakte hain. Grounding (RAG), 'mujhe nahi pata' kehne ke instructions, citations, factual kaam mein kam temperature, code checks, aur high stakes mein human review se kam karo. Evals se hallucination rate naapo.

💡 Real exampleAsli example

A chatbot inventing a refund policy that the company never had.Chatbot ka aisi refund policy gadh dena jo company ki kabhi thi hi nahi.

📖 Learn it step by stepStep by step seekho

• AI safety in products: hallucinations, prompt injection and guardrailsProducts mein AI safety: hallucinations, prompt injection aur guardrails
• What is an LLM? Tokens, context and temperatureLLM kya hai? Tokens, context aur temperature

🔗 Related termsJude hue shabd

• GroundingMaking an LLM base its answer on provided sources or tool results, not just its memory.LLM ke jawaab ko diye gaye sources ya tool results pe based banana, sirf uski yaad pe nahi.
• RAGLetting an LLM answer from your documents: search for relevant passages first, then generate an answer from them with citations.LLM ko aapke documents se jawaab dene dena: pehle relevant hisse dhoondho, phir unhi se citations ke saath jawaab banao.
• EvalsA repeatable set of test cases and scoring rules that measures whether an AI system works well.Test cases aur scoring rules ka dohraaya ja sakne wala set jo naapta hai AI system acche se kaam karta hai ya nahi.