context: It is probably not the case that Greg is a rhino. It is probably the case that Lily is a frog. It is certain that Bernhard is a lion. There is a better than even chance that if Bernhard is a lion, or Greg is a rhino, then Fred moved to the office. It is unlikely that if either Greg is a rhino, or Lily is a frog, then Mary dropped the milk. It is probably not the case that if either Greg is a rhino, or Bernhard is a lion, then John discarded the milk.
hypothesis: We believe that either Greg is a rhino, or Bernhard is a lion.
valid_hypothesis: We believe that either Greg is a rhino, or Bernhard is a lion.
invalid_hypothesis: It is highly unlikely that either Greg is a rhino, or Bernhard is a lion.
hypothesis_assertion: Either Greg is a rhino, or Bernhard is a lion.