context: It is likely that Julie is in the bedroom. There is little chance that Brian is a lion. It is probably not the case that Jeff went to the garden. Chances are about even that if Jeff went to the garden, or Brian is a lion, then Mary dropped the milk. It is likely that if Jeff went to the garden, and Brian is a lion, then Julius is a rhino. It is improbable that if either Jeff went to the garden, or Brian is a lion, then Gertrude is a sheep.
hypothesis: It is unlikely that either Julius is a rhino, or Mary dropped the milk.
valid_hypothesis: It is unlikely that either Julius is a rhino, or Mary dropped the milk.
invalid_hypothesis: It is likely that either Julius is a rhino, or Mary dropped the milk.
hypothesis_assertion: Either Julius is a rhino, or Mary dropped the milk.