context: It is certain that Greg is gray. It is highly likely that John dropped the apple. It is probable that Jeff went to the kitchen. It is probable that if Greg is gray, or Jeff went to the kitchen, then Emily is a cat. It is unlikely that if Greg is gray, and John dropped the apple, then Bernhard is a swan. It is almost certain that if either Jeff went to the kitchen, or Greg is gray, then Bill is in the school.
hypothesis: It is certain that john dropped the apple, or Greg is gray.
valid_hypothesis: It is certain that john dropped the apple, or Greg is gray.
invalid_hypothesis: It is improbable that john dropped the apple, or Greg is gray.
hypothesis_assertion: John dropped the apple, or Greg is gray.