context: Chances are slight that Brian is a lion. We doubt that Bernhard is a rhino. It is highly likely that Greg is a rhino. There is a very good chance that if either Brian is a lion, or Greg is a rhino, then Lily is yellow. There is almost no chance that if Bernhard is a rhino, or Greg is a rhino, then Mary got the apple. We doubt that if either Greg is a rhino, or Brian is a lion, then John moved to the garden.
hypothesis: It is probably the case that mary got the apple, and Brian is a lion.
valid_hypothesis: It is impossible that mary got the apple, and Brian is a lion.
invalid_hypothesis: It is probably the case that mary got the apple, and Brian is a lion.
hypothesis_assertion: Mary got the apple, and Brian is a lion.