context: There is a better than even chance that Fred is in the school. It is unlikely that Bernhard is gray. Chances are about even that Sandra dropped the milk. We believe that if Bernhard is gray, and Sandra dropped the milk, then Greg is a swan. There is a better than even chance that if either Sandra dropped the milk, or Bernhard is gray, then Jeff moved to the office. There is little chance that if either Fred is in the school, or Sandra dropped the milk, then Brian is white.
hypothesis: There is almost no chance that jeff moved to the office, or Bernhard is gray.
valid_hypothesis: Chances are about even that jeff moved to the office, or Bernhard is gray.
invalid_hypothesis: There is almost no chance that jeff moved to the office, or Bernhard is gray.
hypothesis_assertion: Jeff moved to the office, or Bernhard is gray.