Step-Back Prompting
A customer wrote: "My brakes squeal, but only when it rains. Should I replace the pads?" Asked directly, the model answered "Yes, squealing means worn pads — replace them," which sold a part the customer probably did not need. The question's specific framing had pulled the answer toward the most obvious fix. Stepping back first gave a better one.
The rule
Ask the general question first, then answer the specific one with it.
Step-back prompting splits a question into two stages:
- Step back — ask a broader question about the principles, causes or concepts behind the problem.
- Step forward — answer the original question, using the general answer as context.
The first stage writes relevant background knowledge into the context before the model commits to an answer. The specific question alone tends to trigger the most common association ("squeal → pads"); the general question makes the model lay out the full picture first.
Stage 1:
What are the common causes of bicycle brakes squealing, and how does
water on the braking surface change braking noise and performance?
Stage 2:
Using the causes above, answer this customer: "My brakes squeal, but only
when it rains. Should I replace the pads?"With stage one in context, the answer can note that wet braking surfaces often squeal without any fault, that noise only in the rain points to water or dirt rather than wear, and that a quick check or clean is the sensible first step — replacing pads only if they are actually worn.
The shortcut
Ask: "What would an expert need to know before answering this?" Turn that into the step-back question.
Spot the trap
The specific question invites a quick, obvious answer: replace the pads.
Step-back works best when a question depends on underlying principles: diagnosis, science, policy interpretation, "why" questions. It adds little to simple lookups or formatting tasks, and like chain-of-thought it costs extra tokens, so test whether it actually improves your results.
Drills
Answer fast — trust the rule.
What is the first stage of step-back prompting?
For "Why does my tyre go flat overnight but hold air on rides?", which is the best step-back question?
Why can the direct question give a worse answer than the step-back version?
Which task gains least from step-back prompting?
Remember
- Ask the general question first, then answer the specific one with it.
- Shortcut: "What would an expert need to know first?" becomes stage one.
- Trap: using it on simple lookups where it only adds cost.