context: It is certain that Greg is green. It is certain that Mary put down the apple. It is impossible that John dropped the milk.
hypothesis: It is unlikely that mary put down the apple, and Greg is green.
valid_hypothesis: It is certain that mary put down the apple, and Greg is green.
invalid_hypothesis: It is unlikely that mary put down the apple, and Greg is green.
hypothesis_assertion: Mary put down the apple, and Greg is green.