context: Chances are about even that Julius is a swan. It is almost certain that Jessica is a sheep. It is likely that Greg is a rhino. It is likely that if either Julius is a swan, or Greg is a rhino, then Lily is a frog. It is unlikely that if Julius is a swan, or Jessica is a sheep, then Bernhard is gray. There is almost no chance that if Julius is a swan, or Jessica is a sheep, then Mary dropped the milk.
hypothesis: There is little chance that julius is a swan, or Bernhard is gray.
valid_hypothesis: There is a better than even chance that julius is a swan, or Bernhard is gray.
invalid_hypothesis: There is little chance that julius is a swan, or Bernhard is gray.
hypothesis_assertion: Julius is a swan, or Bernhard is gray.