Earlier quoted context omitted.
The recursion ends where people wants it to end. Can your neighborhood struck trade deals with India? Then maybe your neighborhood wants to team up with others around to do that... See where I'm going?
Could Catalunya strike trade deals with the EU even?
It already meets all the requirements to be a member, EU law is ingrained in Catalan law, it has the ability to negotiate and state structures. It just needs to be an independent country.
It would be better to be in the EU, but meanwhile that happens some bilateral trade deals with the EU should be relatively easy to accomplish.
If you're referring to recognition as a country, that's a separate and huge discussion. If Catalonia is not recognised it can't take its part of Spanish debt with it (might be up to 20% of the total) while being a rebel region not paying taxes and maybe under military occupation. How is Spain, which is still in critical condition with a debt of the size of its GDP, going to fare? This month Spain had to get a loan to pay pensions. This month!
So if Spain loses 20% of its GDP while keeping all the debt, how is it going to survive? And if Spain can't pay and falls, what's going to happen to the EU? You thought Brexit was bad? This is much worse!
A situation were the outcome of a YES vote is negotiated and Catalonia pays his dues is a win-win for every stakeholder: Catalans, Catalonia, Spaniards, Spain and the EU. Striking trade deals after that is pure pragmatism.
Just go through old papers about Slovenia or even the Baltics. It's all about realpolitik at the end and Catalonia has to be able to show its value to the world.