context: It is unlikely that Lily is yellow. It is improbable that Bernhard is a lion. Chances are about even that Sandra grabbed the milk. It is probably the case that if Bernhard is a lion, or Sandra grabbed the milk, then Brian is gray. There is little chance that if Bernhard is a lion, and Sandra grabbed the milk, then Mary picked up the apple. It is almost certain that if Sandra grabbed the milk, or Lily is yellow, then Julius is a swan.
hypothesis: It is impossible that lily is yellow, and Mary picked up the apple.
valid_hypothesis: It is impossible that lily is yellow, and Mary picked up the apple.
invalid_hypothesis: It is almost certain that lily is yellow, and Mary picked up the apple.
hypothesis_assertion: Lily is yellow, and Mary picked up the apple.