context: It is almost certain that Sandra grabbed the milk. There is a better than even chance that Brian is a swan. We believe that John put down the apple. We doubt that if Sandra grabbed the milk, or Brian is a swan, then Antoine is bored. There is a very good chance that if Brian is a swan, or Sandra grabbed the milk, then Bernhard is a frog. There is little chance that if either Sandra grabbed the milk, or John put down the apple, then Mary moved to the office.
hypothesis: It is highly unlikely that either Mary moved to the office, or Sandra grabbed the milk.
valid_hypothesis: It is almost certain that either Mary moved to the office, or Sandra grabbed the milk.
invalid_hypothesis: It is highly unlikely that either Mary moved to the office, or Sandra grabbed the milk.
hypothesis_assertion: Either Mary moved to the office, or Sandra grabbed the milk.