LESSON 4.2

Handling the no-answer case

21:33·4,413 learners

Priya Raman

In this lesson you will

Detect when retrieval returned nothing relevant
Make abstaining an explicit, acceptable outcome
Offer a next step instead of a dead end

The hardest behaviour to get is a clean "I don’t know". Make it an explicit, allowed output instead of the model’s last resort.

What this lesson covers

Detect when retrieval returned nothing relevant
Make abstaining an explicit, acceptable outcome
Offer a next step instead of a dead end

This lesson sits in Grounded Generation, part of Retrieval-Augmented Generation from Scratch. It assumes what came before it and leads directly into the next lesson in the module.

PRO TIP

An empty state that points somewhere useful beats a fabricated answer every single time.

UP NEXT

4.3 · End-to-end RAG evaluation

10:43

Retrieval-Augmented Generation from Scratch

83%

4.1 Grounding answers with citations07:16 4.2 Handling the no-answer case21:33 4.3 End-to-end RAG evaluation10:43

Every lesson, searchable to the second.

PRIVACY · TERMS · CONTACT