context: It is probably not the case that Lily is white. We doubt that Brian is white. It is highly likely that Fred moved to the office. It is probable that if either Lily is white, or Brian is white, then John left the milk. It is highly unlikely that if Lily is white, or Fred moved to the office, then Mary dropped the apple. It is highly likely that if either Brian is white, or Fred moved to the office, then Julius is a rhino.
hypothesis: It is likely that either Lily is white, or Mary dropped the apple.
valid_hypothesis: It is probably not the case that either Lily is white, or Mary dropped the apple.
invalid_hypothesis: It is likely that either Lily is white, or Mary dropped the apple.
hypothesis_assertion: Either Lily is white, or Mary dropped the apple.