context: We doubt that Greg is a rhino. It is improbable that Bill is in the park. It is highly likely that Brian is green.
hypothesis: We believe that either Greg is a rhino, or Brian is green.
valid_hypothesis: We believe that either Greg is a rhino, or Brian is green.
invalid_hypothesis: It is improbable that either Greg is a rhino, or Brian is green.
hypothesis_assertion: Either Greg is a rhino, or Brian is green.