context: It is unlikely that Greg is gray. It is highly unlikely that Brian is green. It is highly unlikely that Lily is white. There is little chance that if either Greg is gray, or Brian is green, then Bill dropped the milk. It is probably not the case that if either Brian is green, or Greg is gray, then John left the apple. It is almost certain that if Greg is gray, and Brian is green, then Mary moved to the office.
hypothesis: There is a very good chance that bill dropped the milk, or Brian is green.
valid_hypothesis: It is highly unlikely that bill dropped the milk, or Brian is green.
invalid_hypothesis: There is a very good chance that bill dropped the milk, or Brian is green.
hypothesis_assertion: Bill dropped the milk, or Brian is green.