Sure I can. Read my post 79 and provide a cogent answer to the biblical arguments contained within. You know, something more than your standard content-less one line rejoinder. Include with your answer not only why I am wrong, but why you are right. It would be refreshing if you actually made an arguement for a change, rather than just arguing.
And I will take silence as an admission that you can't demonstrate anything to us, and will publicize your defeat accordingly.
Show us where it says in the Bible that Joseph and Mary had intercourse.
However, my reaction now, before you've even attempted to write anything:
Oh, I'm sorry, but I think you're going to have to "add to the Word of God" to demonstrate what is nowhere stated.