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Mert Özen's blog posts on software development, backend, frontend, and DevOps.

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Artificial Intelligence PART 15

LLM Hallucination and Reliability: Cite, Verify, Measure

Asked for the author of a novel that doesn't exist, gemma3:4b confidently invented a name and a year. We look at why hallucinations happen, force the answer to cite sources with structured output, verify those sources in code and compare three approaches with numbers using a ten-question golden set.

6 Nov 2026 17 min 7

Artificial Intelligence PART 14

LLMs and RAG: Answering with Data the Model Has Never Seen

Asked about the bookstore's return window, gemma3:4b confidently said 30 days; the right answer is 21. We split the policies into chunks, index them with nomic-embed-text, put the closest chunks into the prompt and get the model to say it doesn't know what isn't in the context. A minimal in-memory RAG in C# and its limits.

6 Nov 2026 11 min 6