context: It is impossible that Greg is yellow. It is almost certain that Julius is a lion. We believe that Fred went to the bedroom. It is improbable that if either Greg is yellow, or Julius is a lion, then Brian is gray. It is probably the case that if Julius is a lion, and Fred went to the bedroom, then Lily is white. It is almost certain that if either Greg is yellow, or Fred went to the bedroom, then Jeff dropped the apple.
hypothesis: Chances are about even that either Greg is yellow, or Lily is white.
valid_hypothesis: Chances are about even that either Greg is yellow, or Lily is white.
invalid_hypothesis: It is impossible that either Greg is yellow, or Lily is white.
hypothesis_assertion: Either Greg is yellow, or Lily is white.