# Evidence and validation

Keep the native evidence ladder and contexts attached to their stated method; do not silently reinterpret a grade as observed user benefit.

- [lifecycle-ergonomics](contexts/lifecycle-ergonomics.md)
- [source-policy](contexts/source-policy.md)
- [adversarial-ergonomics](contexts/adversarial-ergonomics.md)

If the native ladder text is unavailable, describe evidence in words: direct observation, study finding with population/method, standard, expert prediction, or anecdote. Do not invent E1–E5 thresholds.