Two points - 1. The existence of George Washington does not violate any observable facts that we find today. All the evidence we have points to his existence. There are not just a few newspaper articles, journals etc. Sure, it's possible - but based on the evidence it is not probable.
Faith is faith.
The issue is the quantity or quality of proof that you require. I don't beleive that lowering our standards for evidence will bring us closer to the truth about the universe. If anything raising the burden of proof will benefit us all. Again, here, there is no reason to rely on faith - never mind the fact that the claim is relatively inconsequential. Or have you merely accepted it.