| Consequential omission and limited attention | Include a question because its answer matters here, not because it is easy to count. |
| Local result and encompassing use | A constituent can be well made yet unsuitable for the larger activity. |
| Stable repetition and changing descriptions | Preserve recurring questions while making edition-sensitive meanings recoverable. |
| Author competence and user effort | Selecting criteria can call for judgement that ordinary users need only apply. |
| Explicit conditions and open inquiry | Keep a bounded list useful without declaring the unlisted world satisfactory. |