context: It is probably not the case that John grabbed the milk. Chances are about even that Yann is bored. It is almost certain that Sandra got the apple.
hypothesis: It is probably not the case that john grabbed the milk, and Sandra got the apple.
valid_hypothesis: It is probably not the case that john grabbed the milk, and Sandra got the apple.
invalid_hypothesis: We believe that john grabbed the milk, and Sandra got the apple.
hypothesis_assertion: John grabbed the milk, and Sandra got the apple.