context: It is impossible that John picked up the apple. It is almost certain that Brian is gray. It is unlikely that Julius is a swan. We doubt that if John picked up the apple, and Brian is gray, then Greg is a frog. It is unlikely that if Julius is a swan, or Brian is gray, then Winona is a cat. We doubt that if Brian is gray, or Julius is a swan, then Mary dropped the milk.
hypothesis: It is probable that mary dropped the milk, or John picked up the apple.
valid_hypothesis: It is unlikely that mary dropped the milk, or John picked up the apple.
invalid_hypothesis: It is probable that mary dropped the milk, or John picked up the apple.
hypothesis_assertion: Mary dropped the milk, or John picked up the apple.