| Coverage and reconstruction | A map locates material, while a user needs the action and its conditions, not a matching heading. |
| Full source promise and bounded use | A maintained synthesis may promise source-complete recovery; a local question may require one contribution only. |
| Falsification and confirmation | One lost condition can defeat a claim, while several successful cases do not prove universal completeness. |
| Local repair and hidden dependence | Preserving unaffected results saves work, while an unrecoverable dependency boundary requires a wider inquiry. |
| Current access and retained evidence | A source can become unavailable without making an earlier supported result false. |