context: It is probably the case that Bernhard is a swan. Chances are slight that Mary got the milk. It is impossible that John went to the hallway. We doubt that if John went to the hallway, or Bernhard is a swan, then Lily is a lion. It is highly likely that if either Bernhard is a swan, or Mary got the milk, then Julius is white. We believe that if Bernhard is a swan, and Mary got the milk, then Greg is a rhino.
hypothesis: It is almost certain that either Greg is a rhino, or Mary got the milk.
valid_hypothesis: It is highly unlikely that either Greg is a rhino, or Mary got the milk.
invalid_hypothesis: It is almost certain that either Greg is a rhino, or Mary got the milk.
hypothesis_assertion: Either Greg is a rhino, or Mary got the milk.