context: It is probable that Greg is a rhino. There is little chance that John took the apple. There is almost no chance that Brian is a swan.
hypothesis: It is impossible that john took the apple, and Brian is a swan.
valid_hypothesis: It is impossible that john took the apple, and Brian is a swan.
invalid_hypothesis: We believe that john took the apple, and Brian is a swan.
hypothesis_assertion: John took the apple, and Brian is a swan.