My original question was closed due to 'possible duplicate'. This was by accident because the question I meant to ask was not the question that I asked.
So, I edited my question by wording it better. As far as I know, and I've searched, there are no duplicates. Can/Does my edited question become "unclosed"? If so, when?
Here's the link to my question: https://stats.stackexchange.com/questions/24163/prove-one-standard-deviation-lies-on-inflection-points