context: It is probably not the case that Sandra left the football. It is improbable that Greg is a swan. There is little chance that Brian is white. There is a very good chance that if either Greg is a swan, or Brian is white, then Bernhard is a lion. There is a very good chance that if Greg is a swan, or Brian is white, then Bill got the milk there. It is highly unlikely that if Greg is a swan, and Sandra left the football, then Winona is a cat.
hypothesis: It is unlikely that bill got the milk there, or Bernhard is a lion.
valid_hypothesis: It is unlikely that bill got the milk there, or Bernhard is a lion.
invalid_hypothesis: It is probably the case that bill got the milk there, or Bernhard is a lion.
hypothesis_assertion: Bill got the milk there, or Bernhard is a lion.