context: We doubt that Mary moved to the office. It is probably not the case that Lily is a rhino. It is impossible that Brian is a frog.
hypothesis: Chances are about even that lily is a rhino, or Mary moved to the office.
valid_hypothesis: Chances are about even that lily is a rhino, or Mary moved to the office.
invalid_hypothesis: There is almost no chance that lily is a rhino, or Mary moved to the office.
hypothesis_assertion: Lily is a rhino, or Mary moved to the office.