context: It is impossible that John went to the kitchen. It is almost certain that Mary dropped the milk. There is almost no chance that Fred is in the park. It is highly likely that if Mary dropped the milk, and John went to the kitchen, then Gertrude is a sheep. It is improbable that if either Fred is in the park, or Mary dropped the milk, then Greg is yellow. Chances are about even that if Mary dropped the milk, or Fred is in the park, then Emily is a cat.
hypothesis: It is impossible that john went to the kitchen, and Greg is yellow.
valid_hypothesis: It is impossible that john went to the kitchen, and Greg is yellow.
invalid_hypothesis: There is a better than even chance that john went to the kitchen, and Greg is yellow.
hypothesis_assertion: John went to the kitchen, and Greg is yellow.