I'm a secret Mason because I disagree with you? Wow. It only took 2 posts of mine to get labeled an infiltrator. Impatient, are we?
Look, just because V2 did not define any doctrine, nor did it bind any catholic to believe anything under pain of sin, nor did it formally teach errors as matters to be believed with certainty of faith, nor did it invoke the apostolic magisterium and authority - i.e. it did not fulfill ALL the requirements for 'teaching faith and morals' as outlined by Vatican I, therefore it's not infallible. Because it didn't do these things, it means it carries no moral weight! It means that it has no moral bite, with which to bind ANY catholic to believe its errors. THIS IS A GOOD THING! Why do you argue the opposite, even after Vatican I spelled out the requirements of infallibility in GREAT detail?
I can only suppose that you WANT Vatican 2 to be doctrinal so that you can use this as an excuse to say that Paul VI was not a true pope. Ok, I get the argument. All I'm saying is that you can use MANY other reasons for saying that Paul VI lost his office, but V2 'teaching error as doctrine' isn't one of them. It was not infallible. It did not formally teach doctrine, as matters of faith, to be believed under pain of sin. Didn't happen. So, look to the other reasons for your sedevacantism support. That's all I'm saying.
If your case for sedevacantism rests on V2, it's quite unstable...