context: It is unlikely that Brian is a frog. It is unlikely that Yann is tired. It is probable that Bill went to the hallway.
hypothesis: It is improbable that bill went to the hallway, and Yann is tired.
valid_hypothesis: It is improbable that bill went to the hallway, and Yann is tired.
invalid_hypothesis: We believe that bill went to the hallway, and Yann is tired.
hypothesis_assertion: Bill went to the hallway, and Yann is tired.