context: There is a better than even chance that John went to the garden. It is probably not the case that Lily is green. It is probably not the case that Julius is yellow. We doubt that if John went to the garden, or Julius is yellow, then Bernhard is a swan. There is a very good chance that if John went to the garden, and Lily is green, then Mary moved to the office. It is unlikely that if either John went to the garden, or Lily is green, then Fred left the milk.
hypothesis: It is impossible that fred left the milk, and Mary moved to the office.
valid_hypothesis: It is impossible that fred left the milk, and Mary moved to the office.
invalid_hypothesis: It is probable that fred left the milk, and Mary moved to the office.
hypothesis_assertion: Fred left the milk, and Mary moved to the office.