context: It is certain that Lily is a lion. Chances are slight that Mary picked up the milk. It is certain that Bernhard is a swan. It is probably the case that if either Mary picked up the milk, or Lily is a lion, then Greg is yellow. It is highly likely that if Mary picked up the milk, and Lily is a lion, then Julius is a rhino. We believe that if Lily is a lion, and Bernhard is a swan, then Antoine is hungry.
hypothesis: We believe that either Bernhard is a swan, or Lily is a lion.
valid_hypothesis: It is impossible that either Bernhard is a swan, or Lily is a lion.
invalid_hypothesis: We believe that either Bernhard is a swan, or Lily is a lion.
hypothesis_assertion: Either Bernhard is a swan, or Lily is a lion.