NASA have about 1.5 million pictures of Earth. Many of them are on the internet, we have photos from satellites, photos from aircraft, hot air balloons, drones and even tall buildings, all showing the earths curvature. We have photos of satellites and the ISS and we can see these and of course the moon with the naked eye or with simple optical devices like telescopes. Yet somehow according to our resident pot head, none of these things exist. What can we learn from this?