context: It is highly unlikely that Brian is a lion. It is unlikely that Mary got the milk. It is highly likely that Lily is yellow. It is highly likely that if Brian is a lion, and Lily is yellow, then Greg is a frog. It is highly unlikely that if Brian is a lion, or Lily is yellow, then Julius is a rhino. Chances are about even that if Brian is a lion, or Mary got the milk, then John discarded the milk.
hypothesis: Chances are slight that either Brian is a lion, or Julius is a rhino.
valid_hypothesis: Chances are slight that either Brian is a lion, or Julius is a rhino.
invalid_hypothesis: It is highly likely that either Brian is a lion, or Julius is a rhino.
hypothesis_assertion: Either Brian is a lion, or Julius is a rhino.