context: It is improbable that Brian is a lion. There is a very good chance that Lily is a frog. It is almost certain that Sandra grabbed the milk. It is unlikely that if Brian is a lion, and Sandra grabbed the milk, then Winona is a wolf. It is probably not the case that if Brian is a lion, and Lily is a frog, then John discarded the apple. Chances are slight that if Lily is a frog, and Brian is a lion, then Bernhard is gray.
hypothesis: It is impossible that john discarded the apple, and Winona is a wolf.
valid_hypothesis: It is impossible that john discarded the apple, and Winona is a wolf.
invalid_hypothesis: It is certain that john discarded the apple, and Winona is a wolf.
hypothesis_assertion: John discarded the apple, and Winona is a wolf.