Based on what though? Where does this definitition come from?
This actually led me to think a bit more about what a country actually is and I realised that I couldn't actually define something I thought would be as easy to define as a pot or a bed. As it turns out, after a bit of googling, I found out that its actually not really defined at all, though people have tried to do so. In addition, whats the difference between a country, a nation and a state?
Seems its not so easy.
Regardless, my point is not to disparage Scotland or the Scots. There is of course a fierce sense of national pride up there. But I'm not really sure that being a country 300 years ago (of course lots of territories have been countries or states in the past and are no longer so and have no realistic prospects of being so) and having a football team is really enough to mark Scotland out as a unique situation.
As I said, it Scotland were to vote for independence, I'd be fully supportive of the Scots' right to do so and would wish them luck, as well as their efforts to rejoin the EU. I imagine the reality though is that any upcoming referendum will be incredibly divisive and an actual divorce from the UK, especially one with a margin as thin as Brexit was, would make Brexit look like an amicable divorce.
Regardless of whether Scotland is a country in the traditional sense or not, the Westminster Government represent the Scots in International settings and, in that context, its very rare to have parts of the overall country have the ability to unilaterally call independence referenda whenever they please.