[CommerceComet]

And I agree it has nothing to do with salvation

I agree with you that salvation doesn't require belief in Peter as Pope nor a belief in the perpetual virginity of Mary. However, Roman Catholics wouldn't agree, at least in my understanding. Can a Roman Catholic tell us for sure: is denial of the belief in Mary's perpetual virginity a mortal sin?

[ravenwolf]

Can a Roman Catholic tell us for sure: is denial of the belief in Mary’s perpetual virginity a mortal sin?

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I don`t know if they teach that or not.
, maybe a catholic can tell you.

[terycarl]

Can a Roman Catholic tell us for sure: is denial of the belief in Mary's perpetual virginity a mortal sin?

denal of...or disbelief in??? major difference.