context: It is probably not the case that Mary went to the office. It is impossible that Emily is a cat. Chances are about even that Brian is gray.
hypothesis: It is certain that emily is a cat, or Brian is gray.
valid_hypothesis: Chances are about even that emily is a cat, or Brian is gray.
invalid_hypothesis: It is certain that emily is a cat, or Brian is gray.
hypothesis_assertion: Emily is a cat, or Brian is gray.