context: It is probable that Fred went to the hallway. It is probably the case that Bernhard is a rhino. We doubt that Mary put down the milk. It is probably the case that if either Bernhard is a rhino, or Mary put down the milk, then Winona is a cat. It is unlikely that if Mary put down the milk, or Bernhard is a rhino, then Brian is a swan. We believe that if Mary put down the milk, and Bernhard is a rhino, then Greg is green.
hypothesis: It is probable that either Mary put down the milk, or Brian is a swan.
valid_hypothesis: It is probably not the case that either Mary put down the milk, or Brian is a swan.
invalid_hypothesis: It is probable that either Mary put down the milk, or Brian is a swan.
hypothesis_assertion: Either Mary put down the milk, or Brian is a swan.