context: It is probable that Mary left the apple. It is highly unlikely that Greg is gray. It is certain that Lily is a frog. It is probable that if Greg is gray, and Lily is a frog, then Bernhard is green. There is a very good chance that if Greg is gray, or Lily is a frog, then Brian is a lion. There is little chance that if Greg is gray, and Mary left the apple, then Sumit is bored.
hypothesis: Chances are about even that either Brian is a lion, or Mary left the apple.
valid_hypothesis: Chances are about even that either Brian is a lion, or Mary left the apple.
invalid_hypothesis: It is impossible that either Brian is a lion, or Mary left the apple.
hypothesis_assertion: Either Brian is a lion, or Mary left the apple.