context: There is little chance that Brian is a lion. It is highly unlikely that Lily is a rhino. It is probably the case that Mary dropped the milk. It is unlikely that if Mary dropped the milk, and Lily is a rhino, then Bernhard is a frog. It is likely that if Lily is a rhino, or Mary dropped the milk, then Julius is white. It is probably the case that if either Mary dropped the milk, or Lily is a rhino, then Greg is a swan.
hypothesis: Chances are about even that lily is a rhino, or Julius is white.
valid_hypothesis: Chances are about even that lily is a rhino, or Julius is white.
invalid_hypothesis: It is almost certain that lily is a rhino, or Julius is white.
hypothesis_assertion: Lily is a rhino, or Julius is white.