So...no false teachings or perceptions are coming from you.
Here is how I see it: The Catholic faith is based on Apostolic tradition which also produced the New Testament. Thomas Jefferson did not belief in any miracles, and at least as they pertain to Mary, neither do you.
Anyone who has had a miracle in their own life is never going to pooh-pooh a miracle that happened to someone else. Was Mary a virgin? Did Jesus call Lazarus from the dead? (Speaking of the occult and talking to the dead as being "unbiblical") Did Jesus really calm the storm? Did he walk on water, feed five thousand?
Technically, none of these are any of my business. They have zilch affect on how I live my life following Christ and the teachings of Jesus.
When someone tells me they don't believe Mary was a virgin or remained a virgin, their belief concerns me not at all--and nor does it have anything to do with the way they are living their life. Think about it. Exactly what would you change in your life if you had irrefutable proof that Mary was assumed into heaven?
I am betting not a single thing would change in your daily life. Nor would anything change in my life if there was irrefutable proof that the bones of Jesus' mother were discovered in a grave. My faith does not hinge on what happened--or did not happen--to someone else.
So prove they are a false teaching. Find the bones of Mary, some DNA from Jesus and present it to me. Otherwise, we are dealing with two teachings: One is the perpetual virginity of Mary and her assumption into heaven--and the other is that nothing special or different was ever a part of Mary's life.