context: It is probably not the case that John discarded the milk. There is little chance that Gertrude is a mouse. There is almost no chance that Mary left the apple. We believe that if Mary left the apple, and Gertrude is a mouse, then Brian is gray. There is a very good chance that if either John discarded the milk, or Mary left the apple, then Bernhard is a lion. It is impossible that if Mary left the apple, or John discarded the milk, then Greg is a swan.
hypothesis: We doubt that either Greg is a swan, or Bernhard is a lion.
valid_hypothesis: We doubt that either Greg is a swan, or Bernhard is a lion.
invalid_hypothesis: We believe that either Greg is a swan, or Bernhard is a lion.
hypothesis_assertion: Either Greg is a swan, or Bernhard is a lion.