context: It is probably not the case that John discarded the milk. It is certain that Greg is a swan. It is likely that Bernhard is gray. We doubt that if Bernhard is gray, and John discarded the milk, then Mary moved to the office. There is a better than even chance that if Bernhard is gray, or John discarded the milk, then Lily is white. We doubt that if Bernhard is gray, and Greg is a swan, then Gertrude is a mouse.
hypothesis: It is certain that mary moved to the office, or John discarded the milk.
valid_hypothesis: It is probably not the case that mary moved to the office, or John discarded the milk.
invalid_hypothesis: It is certain that mary moved to the office, or John discarded the milk.
hypothesis_assertion: Mary moved to the office, or John discarded the milk.