Respectfully Thanh, I just don't think the dog's been exposed to strangers in the house, causing a ruckus where your daughter was in a loud confrontation with them.
Respectfully, you don't know every pit bull in the world, so your opinion is just that. Your opinion. There is not a breed of dog out there in which every individual fits the usual breed type. Thus, you cannot say that there is no pit bull who would not run away and cower, even if his family was begin acosted. Well, you can continue saying it, but most people will probably see it for what it is. Your opinion, not a fact.
susie