context: We doubt that Mary dropped the milk. It is likely that John went to the bedroom. It is unlikely that Lily is a swan.
hypothesis: There is a better than even chance that either John went to the bedroom, or Mary dropped the milk.
valid_hypothesis: There is a better than even chance that either John went to the bedroom, or Mary dropped the milk.
invalid_hypothesis: It is impossible that either John went to the bedroom, or Mary dropped the milk.
hypothesis_assertion: Either John went to the bedroom, or Mary dropped the milk.