I recently ran into this and I liked the notification / call to action.

However, do you really want people adding justification for *Why This Is Not A Duplicate* into the question?  IMO, this is promoting Bad Question Writing by creating a **Second Class Question:** it has to justify it's own existence within the text of the question itself.  This creates questions that are wordy, defensive, and conversational. I fell into this trap [here](http://meta.physics.stackexchange.com/revisions/6591/2).  **That's administrivia, not content!** 

1. I don't like **writing** Second Class Questions.  I want my question to be concise and stand on its own, just like all other Questions. 
2. I don't want to **read** questions that defend their existence.
 
 **If it's not a duplicate, then why should I have to read the defense?** Shouldn't that be irrelevant?  I just want to read the question and the answer.  

Like I said, I really did like the notification / call to action. But I'll put any defense about "why my question should exist" in a comment.  Many others won't, and over time, we'll have more and more questions containing  *Why This Is Not A Duplicate*.

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FYI: I think this Answer should exist.