There are many discussions about whether or we should close questions which include only a short statement of the problem. But these threads are often concerned with new users, less familiar with the website and its working.
Should we be more insistent that high rep (5/7.5/10k) users post better questions?
I'm not saying that every question should include a full length discussion, but some effort and discussion more than just stating a problem. For example, asking whether or not a certain assumption is used in a basic theorem's proof should perhaps include some testimony that the user has reviewed the standard proof and outlined the places where this assumption might be used.