context: It is probable that Greg is a swan. It is certain that Brian is a lion. It is improbable that Lily is gray. It is highly likely that if Greg is a swan, or Brian is a lion, then Jeff dropped the apple. Chances are slight that if either Greg is a swan, or Brian is a lion, then Mary went to the hallway. There is a better than even chance that if Greg is a swan, or Lily is gray, then Jessica is a mouse.
hypothesis: It is probably the case that either Lily is gray, or Mary went to the hallway.
valid_hypothesis: There is little chance that either Lily is gray, or Mary went to the hallway.
invalid_hypothesis: It is probably the case that either Lily is gray, or Mary went to the hallway.
hypothesis_assertion: Either Lily is gray, or Mary went to the hallway.