No, SPAs cannot merge questions.
They can, however, recommend merges, that will be carried out later. Also, they can move misplaced alternates between questions.
To read about the super-useful tasks that the SPA's canperform on the site, however, see the Related Question.
Supervisors can merge questions on WikiAnswers. You can notify Supervisors through the Community Forum, which is checked regularly. It will help if you include the URLs for the questions you think should be merged and we'll take care of it.
If you believe that two questions should be merged, but the recommendation for one did not seem to work, contact any Supervisor or Community Assistant on WikiAnswers. They can merge questions very quickly for you if they are, indeed, similar enough.
Only Supervisors have the ability to merge questions. Non-supervisors who reword questions may trigger a merge that will be sent to a Community Assistant for review. If the two questions should be merged, the CA will merge them.
No, they can't. They can, however, suggest a merge.(See the Related question for details.)
WikiAnswers changes 'I' to 'you' in the questions because WikiAnswers prefers second person over first person questions. It is part of the WikiAnswers Style Rules. It also makes the whole database a lot less hard to manage. Since we merge together questions that are asking the same thing, changing I to you automatically prevents us from having hundreds of thousands of other "I" questions that we would have to merge together.
As a Supervisor, if you merge two answered questions on WikiAnswers, the answers will be placed one below the other on the merged question. Usually a minor edit needs to be done to remove any duplicated information.
If the non-protected question doesn't have an answer, then you can merge it into a protected question. However, if the non-protected question does have an answer, then it cannot be merged into a protected question.
Many contributors who want to be Supervisors are SPAs- Special Project Assistants. See 'related questions' for a full list of SPAs.
If the two questions are nearly identical, either recommend a merge, or ask a Supervisor to merge the questions for you. If the questions are not the same, but have the same answer, it is alright to copy and paste an answer as long as you wrote it. Don't take credit for an answer that you did not write.
This question has been set up as a merge point for test questions that have been copied and pasted to WikiAnswers.
The WikiAnswers site does not allow you to have two identical questions. If there are two questions that would have an identical answer, then they should be merged. Only Supervisors have this ability.
Currently, the ways to merge duplicate questions (that differ immaterially in content) are not as quick as they could be. A feature is planned whereby you could search for specific keywords and edit (and merge) questions without loading separate pages for each question.