context: It is probably not the case that Brian is a swan. It is impossible that Bill went to the bedroom. It is probably the case that Sandra grabbed the milk. There is a better than even chance that if either Bill went to the bedroom, or Brian is a swan, then Greg is gray. It is almost certain that if either Bill went to the bedroom, or Brian is a swan, then John moved to the office. It is impossible that if Brian is a swan, or Sandra grabbed the milk, then Mary is in the garden.
hypothesis: There is little chance that brian is a swan, or Sandra grabbed the milk.
valid_hypothesis: We believe that brian is a swan, or Sandra grabbed the milk.
invalid_hypothesis: There is little chance that brian is a swan, or Sandra grabbed the milk.
hypothesis_assertion: Brian is a swan, or Sandra grabbed the milk.