context: Chances are slight that Greg is gray. It is unlikely that Mary went to the garden. It is improbable that Bernhard is a lion. It is almost certain that if either Bernhard is a lion, or Greg is gray, then Bill dropped the milk. It is almost certain that if Mary went to the garden, and Bernhard is a lion, then Brian is a swan. It is certain that if Greg is gray, and Mary went to the garden, then Lily is white.
hypothesis: It is almost certain that either Lily is white, or Bernhard is a lion.
valid_hypothesis: There is little chance that either Lily is white, or Bernhard is a lion.
invalid_hypothesis: It is almost certain that either Lily is white, or Bernhard is a lion.
hypothesis_assertion: Either Lily is white, or Bernhard is a lion.