context: Chances are slight that Mary went to the office. There is almost no chance that Brian is a lion. It is probably the case that Bernhard is a rhino. It is improbable that if Mary went to the office, or Bernhard is a rhino, then Jeff discarded the milk. It is probably not the case that if either Mary went to the office, or Brian is a lion, then Julius is yellow. We believe that if Bernhard is a rhino, or Mary went to the office, then Lily is a rhino.
hypothesis: There is little chance that julius is yellow, or Lily is a rhino.
valid_hypothesis: There is a better than even chance that julius is yellow, or Lily is a rhino.
invalid_hypothesis: There is little chance that julius is yellow, or Lily is a rhino.
hypothesis_assertion: Julius is yellow, or Lily is a rhino.