The Golden Rule
''NOTHING GOES IN OR OUT.''
The spacesim motto, Nothing goes in or out represents all that Spacesim is about: mission integrity, realism of simulation, and suspension of belief. Simply put, the astronauts must believe they are on another planet or moon in the solar system, and receive no external inputs from the real world. Most importantly, nothing may enter or exit the simulation room during the duration of the mission, for any reason barring a real-life emergency. To a lesser extent, this represents the need that the astronauts forget their real lives for a few days, unplug from the Internet and society, and receive all their information exclusively through Mission Control.