context: It is probable that Brian is green. It is highly likely that Mary went to the bedroom. Chances are about even that Gertrude is a cat. It is unlikely that if Brian is green, and Gertrude is a cat, then John moved to the office. It is certain that if Mary went to the bedroom, or Brian is green, then Sandra grabbed the apple. Chances are slight that if either Mary went to the bedroom, or Brian is green, then Julius is a frog.
hypothesis: Chances are about even that either Gertrude is a cat, or Sandra grabbed the apple.
valid_hypothesis: Chances are about even that either Gertrude is a cat, or Sandra grabbed the apple.
invalid_hypothesis: It is certain that either Gertrude is a cat, or Sandra grabbed the apple.
hypothesis_assertion: Either Gertrude is a cat, or Sandra grabbed the apple.