context: There is a better than even chance that Brian is a swan. It is impossible that Mary left the milk. It is improbable that Lily is white.
hypothesis: It is highly unlikely that either Mary left the milk, or Brian is a swan.
valid_hypothesis: There is a better than even chance that either Mary left the milk, or Brian is a swan.
invalid_hypothesis: It is highly unlikely that either Mary left the milk, or Brian is a swan.
hypothesis_assertion: Either Mary left the milk, or Brian is a swan.