context: It is almost certain that Greg is a swan. It is probable that Sandra got the milk. It is almost certain that Bill is in the school. It is probably the case that if either Bill is in the school, or Greg is a swan, then Bernhard is a lion. It is probable that if Sandra got the milk, and Greg is a swan, then Brian is white. It is probably the case that if Bill is in the school, or Sandra got the milk, then Mary moved to the garden.
hypothesis: It is almost certain that either Bill is in the school, or Bernhard is a lion.
valid_hypothesis: It is almost certain that either Bill is in the school, or Bernhard is a lion.
invalid_hypothesis: There is little chance that either Bill is in the school, or Bernhard is a lion.
hypothesis_assertion: Either Bill is in the school, or Bernhard is a lion.