context: We believe that Mary put down the milk. It is probably not the case that Fred dropped the apple. There is almost no chance that Brian is white.
hypothesis: We doubt that either Brian is white, or Mary put down the milk.
valid_hypothesis: We believe that either Brian is white, or Mary put down the milk.
invalid_hypothesis: We doubt that either Brian is white, or Mary put down the milk.
hypothesis_assertion: Either Brian is white, or Mary put down the milk.