When I said "the Church actually does possess..."...did you notice that I didn't use the words you're using which are "Are you saying that human beings KNOW"?

The Church possesses all necessary truth for us to get to heaven, that's not all knowledge.   Everything we need to know doesn't mean everything.   

A refined intellect - one able to make reasonable distinctions - is a rare thing to find. I am assuming a sharper crowd than appears true.