Prove it.
Yawn. This is too easy.
http://www.freerepublic.com/focus/f-religion/2044024/posts
http://www.freerepublic.com/focus/f-religion/2038427/posts
Oh, wait a minute. Presbyterianism still believes in the trinity so the fact that they have gay clergy and teach that fornication isn’t a sin doesn’t mean they aren’t part of the true church of Christ because, after all, the trinity is the only thing that matters to be a true Christian, right?