context: It is probably not the case that Greg is a rhino. It is probably not the case that Bernhard is a frog. It is impossible that John went to the hallway.
hypothesis: We believe that john went to the hallway, and Bernhard is a frog.
valid_hypothesis: It is impossible that john went to the hallway, and Bernhard is a frog.
invalid_hypothesis: We believe that john went to the hallway, and Bernhard is a frog.
hypothesis_assertion: John went to the hallway, and Bernhard is a frog.