It is almost certain that Jessica is a sheep. It is certain that Mary went to the hallway. There is little chance that Lily is white.
It is impossible that either Mary went to the hallway, or Lily is white.
It is highly likely that either Mary went to the hallway, or Lily is white.
It is impossible that either Mary went to the hallway, or Lily is white.
Either Mary went to the hallway, or Lily is white.