context: We believe that Brian is a lion. Chances are slight that Mary went to the hallway. It is impossible that Sandra left the apple. It is improbable that if Sandra left the apple, and Brian is a lion, then Bernhard is a frog. It is impossible that if Sandra left the apple, and Mary went to the hallway, then Lily is gray. It is highly likely that if Sandra left the apple, or Brian is a lion, then Julius is a swan.
hypothesis: It is unlikely that julius is a swan, or Brian is a lion.
valid_hypothesis: We believe that julius is a swan, or Brian is a lion.
invalid_hypothesis: It is unlikely that julius is a swan, or Brian is a lion.
hypothesis_assertion: Julius is a swan, or Brian is a lion.