One line, one reason
Copy a prompt.
Add one sentence: 'If the note is silent, refuse.'
Run the missing-price case.
Keep the pair only if the refusal now happens and the earlier cases still pass.
Sources and go deeper
- Brown and co-authors, Language Models are Few-Shot Learners, 2020 paper last checked 2026-10
- Prompt engineering — Wikipedia wikipedia last checked 2026-10