context: It is probably the case that Sandra left the milk. We doubt that Greg is a swan. There is little chance that Mary went to the office.
hypothesis: There is a better than even chance that either Sandra left the milk, or Greg is a swan.
valid_hypothesis: There is a better than even chance that either Sandra left the milk, or Greg is a swan.
invalid_hypothesis: It is improbable that either Sandra left the milk, or Greg is a swan.
hypothesis_assertion: Either Sandra left the milk, or Greg is a swan.