Negative, but so what? Nearly every religion believes this.
Catholicism isn't a religion and most Protestant denominations do not say there is no salvation outside of that specific Protestant denomination.
The notion that "if you don't worship my god(s) in my way then you'll be damned forever" is not unique to the Catholic Church, BRTD. Other religions aside, many Christian sects believe that other Christian sects are going to hell because they just aren't getting it right, and many more such sects believe non-Christians don't even stand a chance of going to heaven. Why single out the Catholics?
1-The Catholic church is the largest of these sects.
2-The Catholic church is the only one that likes to pretend that isn't the case.
Actually, you missed the closing statement.
"for those who are not formally and visibly members of the Church, salvation in Christ is accessible by virtue of a grace which, while having a mysterious relationship to the Church, does not make them formally part of the Church, but enlightens them in a way which is accommodated to their spiritual and material situation. This grace comes from Christ; it is the result of his sacrifice and is communicated by the Holy Spirit; it has a relationship with the Church, which, according to the plan of the Father, has her origin in the mission of the Son and the Holy Spirit."
Ah, but it'd be hard to have a "mysterious relationship with the Church" if you were an anti-Catholic Christian strongly opposed to Catholic practices, right? And what about ex-Catholics? They still have a relationship with the chuch they denonced?
What does that matter? The size of the church doesn't change the doctrine. That's a completely irrelevant fact in this debate.
It makes them far more relevant. There's no reason I should focus as much on some random snake handling sect in Appalachia as I do on the largest religious denomination in the world.
Well maybe they actually don't believe it the way you like to say they believe it then. What J.J. points out makes a pretty strong case against your argument.
See what I said above. What if you're a Protestant disgusted by Catholicism? Or an ex-Catholic?