People in a room with blue paint and a door above their heads .
People are in a field .
People in a room with blue paint and a door above their heads.
People are in a field.
If people are in a room with a door above their heads, then these people can't be in a field at the same moment.
If people are in a room with a door above their heads , then these people ca n't be in a field at the same moment .