context: We doubt that Emily is a sheep. It is likely that Fred moved to the office. It is likely that Brian is a rhino.
hypothesis: It is certain that fred moved to the office, and Brian is a rhino.
valid_hypothesis: Chances are about even that fred moved to the office, and Brian is a rhino.
invalid_hypothesis: It is certain that fred moved to the office, and Brian is a rhino.
hypothesis_assertion: Fred moved to the office, and Brian is a rhino.