It happened to me that I wanted to close a question as duplicate of another, but the site refused to do that, because the other question didn't have an upvoted answer. To my surprise there is an (at the moment of writing still ongoing) close voting, where the linked question doesn't have any answers yet:
- Duplicate: Best way to manage long documents with many chapters?
- Linked: Is it common to save each chapter of a document as a separate file?
How is that close voting possible? Is there a certain reputation level you have to reach such that you can overrule the default behavior?