context: It is highly likely that John got the football. There is a very good chance that Greg is gray. We believe that Gertrude is a cat. It is probable that if either Greg is gray, or Gertrude is a cat, then Brian is a frog. It is impossible that if either Gertrude is a cat, or John got the football, then Bernhard is a lion. Chances are about even that if Gertrude is a cat, or Greg is gray, then Mary went to the office.
hypothesis: There is a very good chance that gertrude is a cat, or Mary went to the office.
valid_hypothesis: There is a very good chance that gertrude is a cat, or Mary went to the office.
invalid_hypothesis: It is impossible that gertrude is a cat, or Mary went to the office.
hypothesis_assertion: Gertrude is a cat, or Mary went to the office.