context: We doubt that Mary picked up the apple. There is a very good chance that Brian is a rhino. It is unlikely that Sandra got the football.
hypothesis: It is probable that mary picked up the apple, and Brian is a rhino.
valid_hypothesis: It is unlikely that mary picked up the apple, and Brian is a rhino.
invalid_hypothesis: It is probable that mary picked up the apple, and Brian is a rhino.
hypothesis_assertion: Mary picked up the apple, and Brian is a rhino.