We can close a question as duplicate. But what if exsiting question is unanswered, should both the questions be kept open? If so, what's the point because if existing is unanswered then, new one also would be unanswered and it will increase unanswered percentage statistics only. For example,
Generally it depends on interpretation of users whether two questions are duplicates or not, unless they are accidental or copy paste duplicates. So, i think it really depends on interpretation of users here for the two questions on Bibi Nanchari.
But for unanswered duplicates, you can flag one question for moderation attention explaining reasons if you are very sure. This meta post says:
Unanswered duplicates: Generally, a question cannot be closed as a duplicate of an unanswered question, unless:
- the site is a meta site
- the questions were posted by the same user
- a moderator closes the question
The main point of closing questions as duplicates is to point users to better answers; closing a question as a duplicate of an unanswered question defeats this purpose. Also, this reduces the risk that question A is closed as a duplicate of question B even though the particular circumstances of question A allow an answer that wouldn't work for B. If you're convinced that two unanswered questions are duplicates, flag one for moderator attention and explain your reasoning.