context: It is probably not the case that Brian is gray. It is unlikely that Lily is white. There is little chance that John moved to the garden. It is certain that if either Brian is gray, or Lily is white, then Fred went to the hallway. It is certain that if Lily is white, and John moved to the garden, then Mary left the apple. Chances are about even that if Brian is gray, and Lily is white, then Daniel dropped the milk.
hypothesis: Chances are about even that john moved to the garden, or Fred went to the hallway.
valid_hypothesis: Chances are about even that john moved to the garden, or Fred went to the hallway.
invalid_hypothesis: There is almost no chance that john moved to the garden, or Fred went to the hallway.
hypothesis_assertion: John moved to the garden, or Fred went to the hallway.