Libration disproves the notion of a flat cardboard Moon. Gravity would likely disprove a holographic one, unless it's some exotic form of hologram displaying or simulating gravity proportionate for a body of the Moon's mass and size.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
