The help center article we are working on has this.
For example, questions are welcome that are about:
- Creation of elements of a world (languages, species, buildings, etc.)
- Specific effects of events or world elements on that world's society, cultures, and environment
- Technology and magic
as long as they are not about:
- Specific actions of individual characters, rather than the world they inhabit
- Specific character building
- General writing or storytelling (consider the Writers or Role-playing GamesRole-playing Games Stack Exchange sites)
- Software that doesn't directly relate to worldbuilding (consider the Super User or Software Recommendations Stack Exchange sites)
- This is about the specific actions of characters.
- This is about storytelling and plot.
- This is about something tiny in scale. ^
- This is about something based in science in real life that is a perfectly reasonable Chemistry question.
^ I know we consider all scales, but this is small in impact as well as in physical size.
Therefore off-topic.
To make on topic? I agree that this particular question can't be made on topic. It hits too many trigger for not being WB, albeit just.