context: It is almost certain that Brian is gray. It is highly likely that John dropped the milk. There is a very good chance that Greg is a lion. It is probably the case that if either Brian is gray, or John dropped the milk, then Gertrude is a mouse. We believe that if either John dropped the milk, or Brian is gray, then Lily is a rhino. Chances are slight that if Greg is a lion, and John dropped the milk, then Bernhard is yellow.
hypothesis: We doubt that brian is gray, or Greg is a lion.
valid_hypothesis: It is certain that brian is gray, or Greg is a lion.
invalid_hypothesis: We doubt that brian is gray, or Greg is a lion.
hypothesis_assertion: Brian is gray, or Greg is a lion.