context: There is almost no chance that Julius is a rhino. It is improbable that Mary is in the bedroom. There is almost no chance that John went to the hallway. There is almost no chance that if John went to the hallway, and Mary is in the bedroom, then Lily is a frog. It is certain that if Julius is a rhino, and John went to the hallway, then Greg is gray. It is probable that if John went to the hallway, or Mary is in the bedroom, then Bernhard is yellow.
hypothesis: It is impossible that greg is gray, and John went to the hallway.
valid_hypothesis: It is impossible that greg is gray, and John went to the hallway.
invalid_hypothesis: It is likely that greg is gray, and John went to the hallway.
hypothesis_assertion: Greg is gray, and John went to the hallway.