context: It is improbable that Lily is a swan. It is probably not the case that Bill discarded the milk. It is almost certain that Mary grabbed the milk.
hypothesis: It is probably not the case that either Mary grabbed the milk, or Bill discarded the milk.
valid_hypothesis: We believe that either Mary grabbed the milk, or Bill discarded the milk.
invalid_hypothesis: It is probably not the case that either Mary grabbed the milk, or Bill discarded the milk.
hypothesis_assertion: Either Mary grabbed the milk, or Bill discarded the milk.