Factual error: When the news reporters are summarizing the events of September 22, the camera pans back and up looking over Capitol Hill towards the Northwest. The sun is casting a shadow towards the west indicating that is morning though the "flood" was at midday. Also the rainbow indicates that the sun is behind the viewer and to the East. The westward shadow also casts a bit southward indicating the a shadow of an early morning in the summer. With it being September 22nd, the shadow would cast directly west since the sun rises due East during the equinoxes. (01:25:30)
Continuity mistake: When Evan is looking on his laptop at ark construction and the person comes into the room, he partially closes the laptop, but then next shot it is turned and open completely.
Visible crew/equipment: In the building scene when the animals are watching, you can see a trainer leading a dog at the side of the screen.
Continuity mistake: When Evan tries and fails to shave, you can see him using the same razor every time, but there is no hair on the razor or in the sink.
Answer: God wanted to see what he wanted them to see, to believe in something you can't believe requires faith.