context: There is almost no chance that Brian is white. It is certain that Sandra got the apple. We believe that Winona is a wolf. It is likely that if either Sandra got the apple, or Brian is white, then Mary dropped the milk. It is impossible that if Brian is white, and Winona is a wolf, then Bill went to the hallway. There is almost no chance that if Sandra got the apple, and Brian is white, then Greg is a swan.
hypothesis: It is likely that greg is a swan, and Sandra got the apple.
valid_hypothesis: It is impossible that greg is a swan, and Sandra got the apple.
invalid_hypothesis: It is likely that greg is a swan, and Sandra got the apple.
hypothesis_assertion: Greg is a swan, and Sandra got the apple.