context: It is highly likely that Brian is a frog. It is almost certain that Greg is white. It is almost certain that Julius is gray. It is improbable that if Julius is gray, or Brian is a frog, then Mary is in the garden. There is a very good chance that if either Brian is a frog, or Julius is gray, then Yann got the milk there. It is almost certain that if either Brian is a frog, or Julius is gray, then Fred went to the hallway.
hypothesis: There is little chance that yann got the milk there, or Fred went to the hallway.
valid_hypothesis: There is little chance that yann got the milk there, or Fred went to the hallway.
invalid_hypothesis: It is certain that yann got the milk there, or Fred went to the hallway.
hypothesis_assertion: Yann got the milk there, or Fred went to the hallway.