context: It is probable that Bernhard is a lion. We doubt that Mary went to the hallway. Chances are slight that Julius is white. There is a better than even chance that if Bernhard is a lion, and Julius is white, then Lily is green. It is impossible that if Bernhard is a lion, and Mary went to the hallway, then Bill put down the milk. It is probably the case that if either Julius is white, or Bernhard is a lion, then Greg is yellow.
hypothesis: It is improbable that bill put down the milk, or Julius is white.
valid_hypothesis: It is improbable that bill put down the milk, or Julius is white.
invalid_hypothesis: There is a very good chance that bill put down the milk, or Julius is white.
hypothesis_assertion: Bill put down the milk, or Julius is white.