context: It is unlikely that Daniel dropped the apple. It is improbable that Lily is white. There is little chance that Mary is in the school. We doubt that if either Lily is white, or Mary is in the school, then Bernhard is a lion. It is highly unlikely that if either Mary is in the school, or Lily is white, then Greg is white. It is unlikely that if Lily is white, and Mary is in the school, then Brian is gray.
hypothesis: It is highly likely that brian is gray, and Bernhard is a lion.
valid_hypothesis: It is impossible that brian is gray, and Bernhard is a lion.
invalid_hypothesis: It is highly likely that brian is gray, and Bernhard is a lion.
hypothesis_assertion: Brian is gray, and Bernhard is a lion.