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Deep Dive8 May 2026·8 min read

What is a knowledge base and why does your AI assistant need one?

RAG, vector search, embeddings — explained in plain English for business owners who just want their AI to stop making things up.

NT

Nudge Team

Nudge

You’ve heard “RAG” and “vector search.” Here’s what they actually mean for your business — without the jargon.

The hallucination problem

A raw language model will happily invent a fee or a policy if you let it. For a business, that’s unacceptable. The fix is to never let it answer from memory — only from your documents.

What a knowledge base does

You upload your rate card, menu, brochures, and FAQs. Nudge splits them into chunks and indexes them. When a customer asks a question, it retrieves the most relevant chunks and answers strictly from those — citing your content, not guessing.

Why “vector search” matters

Customers don’t use your exact words. Vector search matches meaning, not keywords — so “how much for the morning batch?” still finds the right line in your rate card. That’s what makes retrieval feel like it understands.

The practical upshot

The better your uploaded documents, the sharper the AI. Garbage in, garbage out — but accurate rate cards in, accurate quotes out.

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