context: It is probably the case that Lily is white. Chances are about even that Mary went to the bedroom. There is a better than even chance that Emily is a cat.
hypothesis: Chances are about even that either Emily is a cat, or Mary went to the bedroom.
valid_hypothesis: Chances are about even that either Emily is a cat, or Mary went to the bedroom.
invalid_hypothesis: It is certain that either Emily is a cat, or Mary went to the bedroom.
hypothesis_assertion: Either Emily is a cat, or Mary went to the bedroom.