Any authentic work of art must start an argument between the artist and his audience.
When I am finishing a picture I hold some God-made object up to it - a rock a flower the branch of a tree or my hand - as a final test. If the painting stands up beside a thing man cannot make the painting is authentic. If there's a clash between the two it's bad art.
When I see myself in the videogame it's amazing how realistic I look. This is the most authentic and realistic soccer game I have ever seen. It is like I'm looking in a mirror. The attention to detail is incredible.
In a secular age an authentic miracle must purport to be a hoax in order to gain credit in the world.