context: It is likely that Julius is white. It is probably not the case that Brian is yellow. There is little chance that Lily is green. There is a very good chance that if Brian is yellow, and Lily is green, then Fred moved to the office. We doubt that if Lily is green, and Julius is white, then Mary put down the milk. It is almost certain that if Lily is green, or Brian is yellow, then Greg is yellow.
hypothesis: It is probable that greg is yellow, and Lily is green.
valid_hypothesis: Chances are slight that greg is yellow, and Lily is green.
invalid_hypothesis: It is probable that greg is yellow, and Lily is green.
hypothesis_assertion: Greg is yellow, and Lily is green.