context: It is certain that Bernhard is a swan. We believe that Lily is green. There is little chance that Bill went to the office. There is little chance that if Bernhard is a swan, or Lily is green, then Greg is gray. It is probable that if Bernhard is a swan, or Bill went to the office, then Mary got the apple. There is a better than even chance that if Bernhard is a swan, and Lily is green, then Antoine is thirsty.
hypothesis: It is improbable that greg is gray, and Lily is green.
valid_hypothesis: It is improbable that greg is gray, and Lily is green.
invalid_hypothesis: There is a very good chance that greg is gray, and Lily is green.
hypothesis_assertion: Greg is gray, and Lily is green.