Recently a user posted about meta that his answer was converted to a comment.
The answer was in this form
Foois thing, so it already frobs the widget so there's no need to specialfrob it.
Check this documentation for details link
The accepted answer was that according to stackoverflow.com/faq#deletion answers that are barely more than a link to an external site may be removed.
The OP was told they needed to update the post to add more content and flag for un-deletion, and that worked.
But it seems to me that the answer without the link to the documentation was enough to make it an acceptable answer at least according to the What is an acceptable answer.
Was it the link that caught the ire of the flagger and moderator? Was it the brevity of the answer? Should I start downvoting/commenting on/flagging answers of this form?