context: It is impossible that Mary dropped the milk. There is almost no chance that Emily is a sheep. Chances are slight that Bernhard is a lion. It is probably the case that if either Mary dropped the milk, or Bernhard is a lion, then Brian is yellow. It is likely that if Mary dropped the milk, and Emily is a sheep, then Greg is a rhino. It is probable that if Mary dropped the milk, or Emily is a sheep, then Lily is white.
hypothesis: It is probable that either Greg is a rhino, or Bernhard is a lion.
valid_hypothesis: There is little chance that either Greg is a rhino, or Bernhard is a lion.
invalid_hypothesis: It is probable that either Greg is a rhino, or Bernhard is a lion.
hypothesis_assertion: Either Greg is a rhino, or Bernhard is a lion.