context: It is likely that Brian is yellow. It is probably not the case that Jeff moved to the office. It is unlikely that Julius is gray. It is almost certain that if either Brian is yellow, or Jeff moved to the office, then Greg is a lion. Chances are slight that if Jeff moved to the office, or Brian is yellow, then Lily is a frog. It is almost certain that if Jeff moved to the office, or Julius is gray, then John went to the kitchen.
hypothesis: It is certain that brian is yellow, and Greg is a lion.
valid_hypothesis: Chances are about even that brian is yellow, and Greg is a lion.
invalid_hypothesis: It is certain that brian is yellow, and Greg is a lion.
hypothesis_assertion: Brian is yellow, and Greg is a lion.