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Lately, I've seen a number of questions closed as duplicates with only gnat's vote, such as When to make classes that do multiple things?

marked as duplicate by gnat, Community

As far as I know, the only legitimate way to do this is by having a gold badge in one of the associated tags. As gnat's one and only tag badge is a bronze badge in , I can only assume this is a bug.

  • Perhaps it would be a good idea for the OP's name to be displayed, instead (or along with) Community. – yannis Oct 4 '16 at 9:46
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    @Yannis there is a declined feature request for that: Change how questions marked as duplicates by the asker are represented. They say, "The asker is not closing the question. They're not closing it unilaterally, they're not closing it with Community's help, they're not casting a binding vote or exercising any special privilege... the system may close their question based on their response. I know this seems like splitting hairs, but... It's a pretty important distinction. Losing it opens up a huge, huge can of worms..." – gnat Oct 4 '16 at 12:43
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    Thanks for digging that up @gnat. Upvoted the request, downvoted shog's answer. – yannis Oct 4 '16 at 12:56
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It's not single-handed: notice the presence of Community in the close voter list.

Last year a feature was introduced to Stack Exchange to allow question askers to single-handedly close their questions as duplicates.

When someone else proposes a possible duplicate, the original poster (and only that person) sees a banner at the top of the post:

"May already have an answer" banner

If the poster clicks the "That solved my problem!" button, the question is closed as a duplicate. The Community "user" is given the responsibility of being the final close voter, but any other voters are listed in the close banner as usual.

So what's happening here is that gnat has proposed a duplicate, and the question asker agreed that the proposal solved the problem.

  • For years, I've wondered who this "Community" admin was and assumed it SE staff. Now I know it's the OP. Thanks for explaining. – David Arno Oct 21 '16 at 5:44
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If you mouse over the "Community" user on that post, you will see the following text:

This question's author approved a pending duplicate vote.

Also note that gold tag "dupe hammers" look different (this is from SO, not sure if we even have any gold tag badges here):

enter image description here

The question you linked has "Community" as the final vote, not a regular user with the gold tag listed.

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It's not a bug. There's a feature where, when a question is voted as a duplicate, the asker is presented with the other question and prompted to either confirm that it's a duplicate or to review the other question(s) and edit to explain what makes their problem different. This is a relatively new feature, but you can probably find more details on Meta Stack Exchange.

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