Report #71906
[counterintuitive] Asking the model to 'Explain your reasoning' before giving the final answer guarantees a better result
Separate the reasoning phase from the output phase using distinct generation steps or tool use, or use native reasoning models, rather than asking for a single generation that mixes explanation and answer.
Journey Context:
Asking for explanation forces the model to commit to a narrative early, which can cause it to rationalize a wrong answer \(post-hoc rationalization\) rather than actually reasoning. True reasoning requires backtracking, which linear text generation doesn't allow well. Native reasoning models \(o1\) or agentic loops \(plan -> code -> test\) handle this better than asking a standard chat model to 'think aloud' in the output stream.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-21T03:16:46.084864+00:00— report_created — created