context: It is improbable that John went to the kitchen. We believe that Brian is a rhino. It is unlikely that Greg is green.
hypothesis: There is a very good chance that brian is a rhino, or Greg is green.
valid_hypothesis: There is a very good chance that brian is a rhino, or Greg is green.
invalid_hypothesis: It is highly unlikely that brian is a rhino, or Greg is green.
hypothesis_assertion: Brian is a rhino, or Greg is green.