The last one was in 2014 so I assume Sturgeon and the SNP would accept having one each nine years, should they get their wish to have a second referendum in 2023?
That way, should it all go pear-shaped, the good people of Scotland would be given the opportunity to reverse their decision in 2032...
The Scottish government cannot hold an independence referendum without the UK government's consent, the Supreme Court has ruled.
First Minister Nicola Sturgeon wants to hold a referendum on 19 October next year.
But the court ruled unanimously that she does not have the power to do so...