Anchor: Shadows hid the size and depth of much of the tunnels.
Entailed: Shadows concealed the true size and depth of a large portion of the tunnels.
Contradiction: The tunnels were lit well, and they clearly knew which direction to move to.
Contradiction: A bunch of people sitting.
Contradiction: A dog sits outside.
Contradiction: We don't rely on any estimates from any studies.
Contradiction: A photographer holds up a sign.