Caustic arcs reflecting from a glass of water, compared to caustic arcs reflecting from the, truth be told, Celestial Sphere/Cosmic Egg/Eye of God. It is not possible to reflect these arcs to the inside of the glass, as suggested with a 'dome' or 'arched' ceiling (Elliptical/Globe or Euclidean/Flat Earth models); the optical geometry fails to work on every level. The sky is convex and the realm we exist is parabolic/concave. The truth remains obfuscated and ridiculed by design, but the growing evidence will inevitably speak for itself... Matthew 5:15"Neither do people light a lamp and put it under a bowl. Instead they put it on its stand, and it gives light to everyone in the house."