context: It is impossible that Brian is a rhino. There is a very good chance that Emily is a wolf. We believe that Bill went to the bedroom. Chances are slight that if Brian is a rhino, or Bill went to the bedroom, then Mary took the apple. It is highly unlikely that if Brian is a rhino, and Bill went to the bedroom, then John moved to the garden. It is impossible that if Emily is a wolf, and Brian is a rhino, then Greg is a frog.
hypothesis: It is impossible that greg is a frog, and Emily is a wolf.
valid_hypothesis: It is impossible that greg is a frog, and Emily is a wolf.
invalid_hypothesis: There is a better than even chance that greg is a frog, and Emily is a wolf.
hypothesis_assertion: Greg is a frog, and Emily is a wolf.