context: It is probable that Mary went to the office. It is certain that Greg is gray. We doubt that Sandra grabbed the milk. It is almost certain that if Mary went to the office, and Sandra grabbed the milk, then John moved to the garden. It is certain that if either Sandra grabbed the milk, or Greg is gray, then Gertrude is a cat. It is improbable that if Greg is gray, or Mary went to the office, then Lily is white.
hypothesis: There is a very good chance that gertrude is a cat, and Greg is gray.
valid_hypothesis: There is a very good chance that gertrude is a cat, and Greg is gray.
invalid_hypothesis: It is impossible that gertrude is a cat, and Greg is gray.
hypothesis_assertion: Gertrude is a cat, and Greg is gray.