[xigikele] Questions bin

Ideal is for people who understand a subject to write about it, teaching others.

Next best might be for such people to write questions about their subject, questions that are easy to answer for someone who understands the material but difficult for someone who doesn't.  Others who are experts can review the questions to verify that they have this property.

Writing questions might be less effort than writing knowledge, i.e., answers.  The latter also requires considerable skill in communicating knowledge.

Questions of course provide a directed goal for people wanting to learn material: keep learning until the questions are easy.

Unlike (say) Wikipedia, which attempts to be a compendium of knowledge, a collection of questions almost seems to be a compendium of what the reader doesn't know: a compendium of lack of knowledge.