context: It is improbable that Greg is white. We believe that John is in the office. It is likely that Brian is a rhino.
hypothesis: There is little chance that either Greg is white, or Brian is a rhino.
valid_hypothesis: It is probably the case that either Greg is white, or Brian is a rhino.
invalid_hypothesis: There is little chance that either Greg is white, or Brian is a rhino.
hypothesis_assertion: Either Greg is white, or Brian is a rhino.