context: We doubt that John dropped the milk. It is highly unlikely that Brian is a lion. It is probably not the case that Mary went to the school.
hypothesis: It is probably not the case that either Brian is a lion, or John dropped the milk.
valid_hypothesis: It is probably not the case that either Brian is a lion, or John dropped the milk.
invalid_hypothesis: We believe that either Brian is a lion, or John dropped the milk.
hypothesis_assertion: Either Brian is a lion, or John dropped the milk.