context: It is certain that John discarded the milk. It is highly unlikely that Mary went to the office. It is highly likely that Greg is yellow. We doubt that if Greg is yellow, and Mary went to the office, then Bernhard is a rhino. We doubt that if Greg is yellow, and John discarded the milk, then Lily is white. There is a very good chance that if either Greg is yellow, or John discarded the milk, then Sandra got the apple.
hypothesis: It is probably the case that bernhard is a rhino, or Sandra got the apple.
valid_hypothesis: Chances are slight that bernhard is a rhino, or Sandra got the apple.
invalid_hypothesis: It is probably the case that bernhard is a rhino, or Sandra got the apple.
hypothesis_assertion: Bernhard is a rhino, or Sandra got the apple.