context: It is probably the case that Mary left the apple. Chances are slight that Brian is gray. It is likely that Greg is yellow. There is a very good chance that if Mary left the apple, and Greg is yellow, then Bill put down the milk. It is highly unlikely that if Mary left the apple, and Greg is yellow, then Bernhard is a lion. It is improbable that if either Brian is gray, or Greg is yellow, then Lily is white.
hypothesis: Chances are slight that either Greg is yellow, or Lily is white.
valid_hypothesis: There is a better than even chance that either Greg is yellow, or Lily is white.
invalid_hypothesis: Chances are slight that either Greg is yellow, or Lily is white.
hypothesis_assertion: Either Greg is yellow, or Lily is white.