If the Trinity can not be found in the scriptures, it then is a myth...Just like all the fables of the mother of Jesus that your religion mandates you Catholics believe...
Fortunately we bible believers do see the Trinity in the scriptures or we wouldn't accept it...We see the doctrine of scripture alone as well...It's all over the bible...That's why we know it's true...
So jesus had a mother? Ok. And Eve was created without original sin? And Jesus is God? And God can do whatever he wants in the divine now? So why would God NOT create His mother free from sin?