context: It is almost certain that Greg is a swan. It is probably not the case that John went to the kitchen. There is a very good chance that Sandra got the football.
hypothesis: It is improbable that sandra got the football, and Greg is a swan.
valid_hypothesis: We believe that sandra got the football, and Greg is a swan.
invalid_hypothesis: It is improbable that sandra got the football, and Greg is a swan.
hypothesis_assertion: Sandra got the football, and Greg is a swan.