context: Chances are about even that Julius is yellow. It is likely that Greg is a rhino. It is probably the case that Brian is a lion. We doubt that if either Julius is yellow, or Brian is a lion, then Bernhard is white. We doubt that if either Greg is a rhino, or Brian is a lion, then Lily is a lion. It is highly unlikely that if Julius is yellow, and Greg is a rhino, then John moved to the office.
hypothesis: It is improbable that either Greg is a rhino, or John moved to the office.
valid_hypothesis: It is likely that either Greg is a rhino, or John moved to the office.
invalid_hypothesis: It is improbable that either Greg is a rhino, or John moved to the office.
hypothesis_assertion: Either Greg is a rhino, or John moved to the office.