context: It is probably not the case that Brian is a lion. It is improbable that Daniel got the milk. There is little chance that Sandra grabbed the apple. It is almost certain that if Brian is a lion, or Sandra grabbed the apple, then Mary moved to the office. It is impossible that if Brian is a lion, and Sandra grabbed the apple, then Greg is a rhino. Chances are about even that if either Daniel got the milk, or Sandra grabbed the apple, then Bernhard is a frog.
hypothesis: Chances are slight that either Daniel got the milk, or Greg is a rhino.
valid_hypothesis: Chances are slight that either Daniel got the milk, or Greg is a rhino.
invalid_hypothesis: It is highly likely that either Daniel got the milk, or Greg is a rhino.
hypothesis_assertion: Either Daniel got the milk, or Greg is a rhino.