That's where faith gets involved. I have faith that the Bible is the divinely inspired word of God. A lot of things in the Bible have been archaeologically proven. But there are parts of His word that we have to have faith in to believe. I equate it to my interactions with my daughter. She can believe me when I tell her to not touch the stove because it's too hot and it'll hurt her. Or she can not believe me and experience it for herself and learn that I only want what's best for her.