context: It is improbable that Brian is yellow. It is probable that Greg is a swan. Chances are slight that John dropped the apple.
hypothesis: We believe that john dropped the apple, or Greg is a swan.
valid_hypothesis: We believe that john dropped the apple, or Greg is a swan.
invalid_hypothesis: There is little chance that john dropped the apple, or Greg is a swan.
hypothesis_assertion: John dropped the apple, or Greg is a swan.