context: It is certain that Mary went to the garden. There is a very good chance that Lily is green. We believe that Greg is green. It is highly unlikely that if Mary went to the garden, or Lily is green, then Bill moved to the office. It is highly likely that if either Lily is green, or Mary went to the garden, then Brian is a frog. It is almost certain that if Mary went to the garden, and Greg is green, then John is in the hallway.
hypothesis: It is certain that either Lily is green, or Brian is a frog.
valid_hypothesis: It is certain that either Lily is green, or Brian is a frog.
invalid_hypothesis: There is almost no chance that either Lily is green, or Brian is a frog.
hypothesis_assertion: Either Lily is green, or Brian is a frog.