context: It is impossible that Bill is in the school. There is almost no chance that Greg is a rhino. It is likely that Mary put down the milk. It is almost certain that if either Bill is in the school, or Mary put down the milk, then Bernhard is a lion. There is almost no chance that if either Mary put down the milk, or Greg is a rhino, then Julius is a swan. It is highly likely that if either Bill is in the school, or Greg is a rhino, then John went to the garden.
hypothesis: It is probable that bill is in the school, or Bernhard is a lion.
valid_hypothesis: It is probable that bill is in the school, or Bernhard is a lion.
invalid_hypothesis: Chances are slight that bill is in the school, or Bernhard is a lion.
hypothesis_assertion: Bill is in the school, or Bernhard is a lion.