context: It is almost certain that Greg is a frog. There is a better than even chance that Lily is yellow. It is probably not the case that Brian is a swan. It is improbable that if Greg is a frog, and Brian is a swan, then Bernhard is green. It is unlikely that if Brian is a swan, or Greg is a frog, then Mary is in the school. It is probable that if either Lily is yellow, or Brian is a swan, then John discarded the milk.
hypothesis: It is certain that john discarded the milk, or Mary is in the school.
valid_hypothesis: Chances are about even that john discarded the milk, or Mary is in the school.
invalid_hypothesis: It is certain that john discarded the milk, or Mary is in the school.
hypothesis_assertion: John discarded the milk, or Mary is in the school.