context: It is impossible that Fred put down the apple. It is impossible that Mary dropped the milk. There is a very good chance that Greg is a swan.
hypothesis: There is a very good chance that greg is a swan, and Mary dropped the milk.
valid_hypothesis: It is impossible that greg is a swan, and Mary dropped the milk.
invalid_hypothesis: There is a very good chance that greg is a swan, and Mary dropped the milk.
hypothesis_assertion: Greg is a swan, and Mary dropped the milk.