context: It is improbable that Sandra got the apple. It is highly unlikely that Brian is a lion. There is little chance that Bill dropped the milk. It is unlikely that if either Bill dropped the milk, or Sandra got the apple, then Mary went to the hallway. There is little chance that if Brian is a lion, or Sandra got the apple, then Lily is gray. It is almost certain that if either Sandra got the apple, or Brian is a lion, then Jeff moved to the office.
hypothesis: It is certain that either Jeff moved to the office, or Bill dropped the milk.
valid_hypothesis: It is unlikely that either Jeff moved to the office, or Bill dropped the milk.
invalid_hypothesis: It is certain that either Jeff moved to the office, or Bill dropped the milk.
hypothesis_assertion: Either Jeff moved to the office, or Bill dropped the milk.