text: Another example that demonstrates my claim is that according to the author, you can see what it is made of. The author shows that the huge rock formation, which resembles a human head, is formed by shadows giving the illusion of eyes, nose, and a mouth. The author also states that Garvin said, "as a rule of thumb, you can discern things in a digital image 3 times bigger that the pixel size, so if there were objects in this picture like, airplaines on the ground, or Egytian-style pyramids, or even small shacks, you could see what they were!"