When 3.6 million Scots voted Thursday on whether to leave or stay within the United Kingdom, they were answering one simple question: Should Scotland be an independent country?

But for a time some politicians on both sides of the debate wanted to include a third choice on the ballot: maximum devolution of powers to Scotland within Britain, or so-called devo-max. Even Alex Salmond, Scotland's first minister and leader of the Scottish National Party, backed including such an alternative, arguing that he was "not for limiting the choices of the Scottish people."

British Prime Minister David Cameron and many of Salmond's SNP colleagues, though, were against the idea. Scots, Cameron said at the time, would be faced with "what I've always wanted, which is one single question. Not two questions, not devo-max, not different options; a very simple, single question."