pairs of boxes have been prepared and sent to earth and on vulcan. there is something inside that shows a light when a door is opened. if the same doors are opened on both members of the pair, then both lights will be blue or both lights will be red. what if different doors are opened? maybe the chances that a red light or a blue light shows up were set by the maker of the boxes. or maybe whether a red light or a blue light shows up depends on an individual coin flip in each box. how can we tell?