context: Chances are about even that Sandra got the apple. It is impossible that Mary put down the apple. There is a better than even chance that John dropped the milk.
hypothesis: It is impossible that sandra got the apple, and Mary put down the apple.
valid_hypothesis: It is impossible that sandra got the apple, and Mary put down the apple.
invalid_hypothesis: There is a better than even chance that sandra got the apple, and Mary put down the apple.
hypothesis_assertion: Sandra got the apple, and Mary put down the apple.