context: It is probably not the case that Jeff went to the office. It is certain that Brian is a rhino. It is certain that Sandra took the football.
hypothesis: We believe that either Brian is a rhino, or Jeff went to the office.
valid_hypothesis: We believe that either Brian is a rhino, or Jeff went to the office.
invalid_hypothesis: Chances are slight that either Brian is a rhino, or Jeff went to the office.
hypothesis_assertion: Either Brian is a rhino, or Jeff went to the office.