context: It is probably the case that Greg is a swan. There is a very good chance that Lily is yellow. We doubt that John dropped the milk.
hypothesis: There is a very good chance that john dropped the milk, or Lily is yellow.
valid_hypothesis: There is a very good chance that john dropped the milk, or Lily is yellow.
invalid_hypothesis: There is little chance that john dropped the milk, or Lily is yellow.
hypothesis_assertion: John dropped the milk, or Lily is yellow.